Support for Website Project
Now that Web site projects have support to invoke web.config transforms on publish/package, SlowCheetah should enable transforming files besides web.Config.
Note: There are two types of web projects in VS.
1. Web Application Project lie Web Forms, mvc)
2. Wes site project
This feature is specific to #2.
See http://blogs.msdn.com/b/webdev/archive/2012/11/20/new-web-publish-updates.aspx for the details of the website project updates.