add appveyor.yml

appveyor.yml

@@ -0,0 +1,20 @@
+version: "{build}"
+
+os: Windows Server 2012 R2
+
+environment:
+  GOPATH: c:\gopath
+  GOVERSION: 1.7
+
+install:
+  - set PATH=%GOPATH%\bin;c:\go\bin;%PATH%
+  - rmdir c:\go /s /q
+  - appveyor DownloadFile https://storage.googleapis.com/golang/go%GOVERSION%.windows-amd64.zip
+  - 7z x go%GOVERSION%.windows-amd64.zip -y -oC:\ > NUL
+  - go version
+  - go env
+  - go get -v -t ./...
+
+build_script:
+  - go build -v .
+  - go test -v ./...