add appveyor CI support

.Rbuildignore

@@ -1,3 +1,5 @@
 LICENSE
 ^\.travis\.yml$
+^travis-tool\.sh
+^appveyor\.yml$
 

.gitattributes

@@ -0,0 +1,5 @@
+* text=auto
+data/* binary
+src/* text=lf
+R/* text=lf
+

appveyor.yml

@@ -0,0 +1,44 @@
+# DO NOT CHANGE the "init" and "install" sections below
+
+environment:
+  R_CHECK_ARGS: --no-build-vignettes --no-manual
+
+# Download script file from GitHub
+init:
+  ps: |
+        $ErrorActionPreference = "Stop"
+        Invoke-WebRequest http://raw.github.com/krlmlr/r-appveyor/master/scripts/appveyor-tool.ps1 -OutFile "..\appveyor-tool.ps1"
+        Import-Module '..\appveyor-tool.ps1'
+
+install:
+  ps: Bootstrap
+
+# Adapt as necessary starting from here
+
+build_script:
+  - travis-tool.sh install_deps
+
+test_script:
+  - travis-tool.sh run_tests
+
+on_failure:
+  - travis-tool.sh dump_logs
+
+artifacts:
+  - path: '*.Rcheck\**\*.log'
+    name: Logs
+
+  - path: '*.Rcheck\**\*.out'
+    name: Logs
+
+  - path: '*.Rcheck\**\*.fail'
+    name: Logs
+
+  - path: '*.Rcheck\**\*.Rout'
+    name: Logs
+
+  - path: '\*_*.tar.gz'
+    name: Bits
+
+  - path: '\*_*.zip'
+    name: Bits