Separated Chocolatey to its own solution and removed it from both VS2012 and VS2013.

Added a new Chocolatey package for VS2013
Solution directory hack for team city.
Added release notes as a link in the manifest file for VS 2013, so it will be available in the Visual Studio Gallery.
Added the release notes link in the manifest file for VS 2012. So release notes will appear as a link in the Visual Studio Gallery.
Merge branch 'release-2.1.0'