diff --git a/builds/msvc/vs2013/libbitcoin-client-examples/libbitcoin-client-examples.vcxproj b/builds/msvc/vs2013/libbitcoin-client-examples/libbitcoin-client-examples.vcxproj
index 84490b9..5deaaaf 100644
--- a/builds/msvc/vs2013/libbitcoin-client-examples/libbitcoin-client-examples.vcxproj
+++ b/builds/msvc/vs2013/libbitcoin-client-examples/libbitcoin-client-examples.vcxproj
@@ -71,12 +71,14 @@
   <ImportGroup Label="ExtensionTargets" />
   <ImportGroup Label="ExtensionSettings">
     <Import Project="..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets')" />
+    <Import Project="..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets')" />
+    <Import Project="..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\czmq_vc120.3.0.1.0\build\native\czmq_vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\czmq_vc120.3.0.1.0\build\native\czmq_vc120.targets')" />
@@ -88,12 +90,14 @@
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets'))" />
+    <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets'))" />
+    <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\czmq_vc120.3.0.1.0\build\native\czmq_vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\czmq_vc120.3.0.1.0\build\native\czmq_vc120.targets'))" />
diff --git a/builds/msvc/vs2013/libbitcoin-client-examples/packages.config b/builds/msvc/vs2013/libbitcoin-client-examples/packages.config
index c73d240..49ecac2 100644
--- a/builds/msvc/vs2013/libbitcoin-client-examples/packages.config
+++ b/builds/msvc/vs2013/libbitcoin-client-examples/packages.config
@@ -1,12 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="boost" version="1.56.0.0" targetFramework="Native" />
+  <package id="boost_chrono-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_date_time-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_filesystem-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_locale-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_program_options-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_regex-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_system-vc120" version="1.56.0.0" targetFramework="Native" />
+  <package id="boost_thread-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="czmq_vc120" version="3.0.1.0" targetFramework="Native" />
   <package id="czmqpp_vc120" version="1.1.0.0" targetFramework="Native" />
   <package id="libsodium_vc120" version="1.0.0.0" targetFramework="Native" />
diff --git a/builds/msvc/vs2013/libbitcoin-client-test/libbitcoin-client-test.vcxproj b/builds/msvc/vs2013/libbitcoin-client-test/libbitcoin-client-test.vcxproj
index 0f806d5..3050ab0 100644
--- a/builds/msvc/vs2013/libbitcoin-client-test/libbitcoin-client-test.vcxproj
+++ b/builds/msvc/vs2013/libbitcoin-client-test/libbitcoin-client-test.vcxproj
@@ -75,12 +75,14 @@
   <ImportGroup Label="ExtensionTargets" />
   <ImportGroup Label="ExtensionSettings">
     <Import Project="..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets')" />
+    <Import Project="..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets')" />
+    <Import Project="..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_unit_test_framework-vc120.1.56.0.0\build\native\boost_unit_test_framework-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_unit_test_framework-vc120.1.56.0.0\build\native\boost_unit_test_framework-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets')" />
@@ -93,12 +95,14 @@
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets'))" />
+    <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets'))" />
+    <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_unit_test_framework-vc120.1.56.0.0\build\native\boost_unit_test_framework-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_unit_test_framework-vc120.1.56.0.0\build\native\boost_unit_test_framework-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets'))" />
diff --git a/builds/msvc/vs2013/libbitcoin-client-test/packages.config b/builds/msvc/vs2013/libbitcoin-client-test/packages.config
index c804b26..d300696 100644
--- a/builds/msvc/vs2013/libbitcoin-client-test/packages.config
+++ b/builds/msvc/vs2013/libbitcoin-client-test/packages.config
@@ -1,12 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="boost" version="1.56.0.0" targetFramework="Native" />
+  <package id="boost_chrono-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_date_time-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_filesystem-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_locale-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_program_options-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_regex-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_system-vc120" version="1.56.0.0" targetFramework="Native" />
+  <package id="boost_thread-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_unit_test_framework-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="czmq_vc120" version="3.0.1.0" targetFramework="Native" />
   <package id="czmqpp_vc120" version="1.1.0.0" targetFramework="Native" />
diff --git a/builds/msvc/vs2013/libbitcoin-client/libbitcoin-client.vcxproj b/builds/msvc/vs2013/libbitcoin-client/libbitcoin-client.vcxproj
index 9a5bfbc..9075388 100644
--- a/builds/msvc/vs2013/libbitcoin-client/libbitcoin-client.vcxproj
+++ b/builds/msvc/vs2013/libbitcoin-client/libbitcoin-client.vcxproj
@@ -91,12 +91,14 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionSettings">
     <Import Project="..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets')" />
+    <Import Project="..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets')" />
+    <Import Project="..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets')" />
     <Import Project="..\..\..\..\..\..\nuget\czmq_vc120.3.0.1.0\build\native\czmq_vc120.targets" Condition="Exists('..\..\..\..\..\..\nuget\czmq_vc120.3.0.1.0\build\native\czmq_vc120.targets')" />
@@ -108,12 +110,14 @@
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
     </PropertyGroup>
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost.1.56.0.0\build\native\boost.targets'))" />
+    <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_chrono-vc120.1.56.0.0\build\native\boost_chrono-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_date_time-vc120.1.56.0.0\build\native\boost_date_time-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_filesystem-vc120.1.56.0.0\build\native\boost_filesystem-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_locale-vc120.1.56.0.0\build\native\boost_locale-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_program_options-vc120.1.56.0.0\build\native\boost_program_options-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_regex-vc120.1.56.0.0\build\native\boost_regex-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_system-vc120.1.56.0.0\build\native\boost_system-vc120.targets'))" />
+    <Error Condition="!Exists('..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\boost_thread-vc120.1.56.0.0\build\native\boost_thread-vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\libsodium_vc120.1.0.0.0\build\native\libsodium_vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\libzmq_vc120.4.2.0.0\build\native\libzmq_vc120.targets'))" />
     <Error Condition="!Exists('..\..\..\..\..\..\nuget\czmq_vc120.3.0.1.0\build\native\czmq_vc120.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\..\..\..\nuget\czmq_vc120.3.0.1.0\build\native\czmq_vc120.targets'))" />
diff --git a/builds/msvc/vs2013/libbitcoin-client/packages.config b/builds/msvc/vs2013/libbitcoin-client/packages.config
index c73d240..49ecac2 100644
--- a/builds/msvc/vs2013/libbitcoin-client/packages.config
+++ b/builds/msvc/vs2013/libbitcoin-client/packages.config
@@ -1,12 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="boost" version="1.56.0.0" targetFramework="Native" />
+  <package id="boost_chrono-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_date_time-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_filesystem-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_locale-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_program_options-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_regex-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="boost_system-vc120" version="1.56.0.0" targetFramework="Native" />
+  <package id="boost_thread-vc120" version="1.56.0.0" targetFramework="Native" />
   <package id="czmq_vc120" version="3.0.1.0" targetFramework="Native" />
   <package id="czmqpp_vc120" version="1.1.0.0" targetFramework="Native" />
   <package id="libsodium_vc120" version="1.0.0.0" targetFramework="Native" />
diff --git a/install.sh b/install.sh
index 8dae502..44a9483 100755
--- a/install.sh
+++ b/install.sh
@@ -112,6 +112,8 @@ for OPTION in "$@"; do
     case $OPTION in
         # Custom build options (in the form of --build-<option>).
         (--build-icu)      BUILD_ICU="yes";;
+        (--build-png)      BUILD_PNG="yes";;
+        (--build-qrencode) BUILD_QRENCODE="yes";;
         (--build-boost)    BUILD_BOOST="yes";;
         (--build-dir=*)    BUILD_DIR="${OPTION#*=}";;
         
@@ -120,6 +122,8 @@ for OPTION in "$@"; do
         (--disable-shared) DISABLE_SHARED="yes";;
         (--disable-static) DISABLE_STATIC="yes";;
         (--with-icu)       WITH_ICU="yes";;
+        (--with-png)       WITH_PNG="yes";;
+        (--with-qrencode)  WITH_QRENCODE="yes";;
     esac
 done
 echo "Build directory: $BUILD_DIR"
@@ -128,13 +132,29 @@ echo "Prefix directory: $PREFIX"
 # Warn on configurations that imply static/prefix isolation.
 #------------------------------------------------------------------------------
 if [[ $BUILD_ICU == yes ]]; then
-    if [[ !($PREFIX)]]; then    
+    if [[ !($PREFIX)]]; then
         echo "Warning: --prefix recommended when building ICU."
     fi
     if [[ !($DISABLE_SHARED) ]]; then
         echo "Warning: --disable-shared recommended when building ICU."
     fi
 fi
+if [[ $BUILD_QRENCODE == yes ]]; then
+    if [[ !($PREFIX)]]; then
+        echo "Warning: --prefix recommended when building QRENCODE."
+    fi
+    if [[ !($DISABLE_SHARED) ]]; then
+        echo "Warning: --disable-shared recommended when building QRENCODE."
+    fi
+fi
+if [[ $BUILD_PNG == yes ]]; then
+    if [[ !($PREFIX)]]; then
+        echo "Warning: --prefix recommended when building PNG."
+    fi
+    if [[ !($DISABLE_SHARED) ]]; then
+        echo "Warning: --disable-shared recommended when building PNG."
+    fi
+fi
 if [[ $BUILD_BOOST == yes ]]; then
     if [[ !($PREFIX)]]; then    
         echo "Warning: --prefix recommended when building boost."
@@ -147,7 +167,7 @@ fi
 # Purge custom options so they don't go to configure.
 #------------------------------------------------------------------------------
 CONFIGURE_OPTIONS=( "$@" )
-CUSTOM_OPTIONS=( "--build-icu" "--build-boost" "--build-dir=$BUILD_DIR" )
+CUSTOM_OPTIONS=( "--build-icu" "--build-boost" "--build-png" "--build-qrencode" "--build-dir=$BUILD_DIR")
 for CUSTOM_OPTION in "${CUSTOM_OPTIONS[@]}"; do
     CONFIGURE_OPTIONS=( "${CONFIGURE_OPTIONS[@]/$CUSTOM_OPTION}" )
 done
@@ -157,12 +177,18 @@ done
 if [[ $DISABLE_STATIC == yes ]]; then
     BOOST_LINK="link=shared"
     ICU_LINK="--enable-shared --disable-static"
+    PNG_LINK="--enable-shared --disable-static"
+    QRENCODE_LINK="--enable-shared --disable-static"
 elif [[ $DISABLE_SHARED == yes ]]; then
     BOOST_LINK="link=static"
     ICU_LINK="--disable-shared --enable-static"
+    PNG_LINK="--disable-shared --enable-static"
+    QRENCODE_LINK="--disable-shared --enable-static"
 else
     BOOST_LINK="link=static,shared"
     ICU_LINK="--enable-shared --enable-static"
+    PNG_LINK="--enable-shared --enable-static"
+    QRENCODE_LINK="--enable-shared --enable-static"
 fi
 
 # Incorporate the prefix.
@@ -209,6 +235,7 @@ BOOST_OPTIONS_GCC=\
 "--with-program_options "\
 "--with-regex "\
 "--with-system "\
+"--with-thread "\
 "--with-test "
 
 # Define boost options for clang.
@@ -222,6 +249,7 @@ BOOST_OPTIONS_CLANG=\
 "--with-program_options "\
 "--with-regex "\
 "--with-system "\
+"--with-thread "\
 "--with-test "
 
 # Define sodium options.
@@ -434,33 +462,30 @@ push_directory()
 
 # Build functions.
 #==============================================================================
-build_from_tarball_icu()
+build_from_tarball()
 {
     local URL=$1
     local ARCHIVE=$2
-    local REPO=$3
+    local ARCHIVE_TYPE=$3
     local JOBS=$4
-    shift 4
-
-    if [[ !($BUILD_ICU) ]]; then
-        initialize_icu_packages
-        display_message "ICU build not enabled"
-        return
-    fi
+    local PUSH_DIR=$5
+    local LINK=$6
+    local STANDARD=$7
+    shift 7
 
     display_message "Download $ARCHIVE"
 
-    create_directory $REPO
-    push_directory $REPO
+    local EXTRACTED_DIR=`echo $ARCHIVE | sed "s/.tar.$ARCHIVE_TYPE//g"`
+
+    create_directory $EXTRACTED_DIR
+    push_directory $EXTRACTED_DIR
 
     # Extract the source locally.
     wget --output-document $ARCHIVE $URL
-    tar --extract --file $ARCHIVE --strip-components=1
-    push_directory "source"
+    tar --extract --file $ARCHIVE --$ARCHIVE_TYPE --strip-components=1
+    push_directory $PUSH_DIR
 
-    # Build and install.
-    # ICU is a typical GNU build except that it fails on unknown options.
-    configure_options $ICU_LINK $ICU_STANDARD ${prefix} "$@"
+    configure_options $LINK $STANDARD ${prefix} "$@"
     make_jobs $JOBS --silent
     make install
     configure_links