Usage Instructions:

1) Compile with VS2012 or VS2013.
2) Double click the .vsix in the output directory.
3) Choose the version of VS to install to.
Usage Instructions:

0) Install the version of Visual Studio SDK which matches
   the Visual Studio version with which you will compile.
1) Compile with VS2012 or VS2013.
2) Double click the .vsix in the output directory.
3) Choose the version of VS to install to.
Add instruction to install Visual Studio SDK for ChromeDebug.
Add instruction to install Visual Studio SDK for ChromeDebug.

For C# projects, if a ProjectType GUID is not available, the vague error
"The project type is not supported by this installation" is given.
In this case the issue is usually that the Visual Studio SDK is not
installed.

R=zturner@chromium.org

Review URL: https://codereview.chromium.org/26460003

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@227550 0039d316-1c4b-4281-b951-d872f2087c98
