Works in VS 2013

Steps I took to get it to work on my machine:

1. Load the .sln in VS 2013
2. Allow VS 2013 to upgrade all of the projects. 
3. Change the .NET version to .NET 4.5.1
4. Change the vsixmanifest to include support for version "12" of Visual Studio. 

Also, this is my first pull request, so don't flame me if I did something wrong. :)