Adding libevthr dependency

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "http_parser"]
 	path = http_parser
 	url = https://github.com/ry/http-parser.git
+[submodule "evthr"]
+	path = evthr
+	url = https://github.com/ellzey/libevthr.git

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 2.8)
 project(reason)
 
 set(PROJECT_MAJOR_VERSION 0)
-set(PROJECT_MINOR_VERSION 1)
+set(PROJECT_MINOR_VERSION 2)
 set(PROJECT_PATCH_VERSION 0)
 
 set (PROJECT_VERSION   ${PROJECT_MAJOR_VERSION}.${PROJECT_MINOR_VERSION}.${PROJECT_PATCH_VERSION})
@@ -19,19 +19,21 @@ find_package(LibEvent)
 
 include_directories(
 	${CMAKE_CURRENT_SOURCE_DIR}
+  ${CMAKE_CURRENT_SOURCE_DIR}/evthr
 	${CMAKE_CURRENT_SOURCE_DIR}/http_parser
 )
 
 set(LIBEVHTP_EXTERNAL_LIBS 
 	${LIBEVENT_LIBRARY}
+  ${LIBEVENT_PTHREADS_LIBRARY}
 	${CMAKE_CURRENT_SOURCE_DIR}
   ${CMAKE_CURRENT_SOURCE_DIR}/build
 )
-set(LIBEVHTP_SOURCES http_parser/http_parser.c evhtp.c)
+set(LIBEVHTP_SOURCES evthr/evthr.c http_parser/http_parser.c evhtp.c)
 
 add_library(libevhtp STATIC ${LIBEVHTP_SOURCES})
 set_target_properties(libevhtp PROPERTIES OUTPUT_NAME "evhtp")
 target_link_libraries(libevhtp ${LIVEVHTP_EXTERNAL_LIBS})
 
 add_executable(test test.c)
-target_link_libraries(test libevhtp event)
+target_link_libraries(test libevhtp event event_pthreads)