Build the GitHub.VisualStudio project and VSIX file

This can being the build time from 19s to 13s (on my laptop).

Author: jcansdale

build.cmd

@@ -1,4 +1,6 @@
 @if "%config%" == "" set config=Debug
 
 call "%ProgramFiles(x86)%\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat"
-msbuild GitHubVS.sln /p:Configuration=%Config%
+
+@rem Build the GitHub.VisualStudio project / VSIX file
+msbuild GitHubVS.sln /p:Configuration=%Config% /t:GitHub_VisualStudio