Option to only apply template configuration to the root web.config file

Probably not the nicest solution to the problem. However, if you call the MsDeploy task for an MVC project, or any project with multiple web.config files, all web.config files found are templated.

This screws up any web.config files found in the Views subdirectories.

Non-breaking change. Defaults always to false so anyone who was previously having all web.config files configured will be unaffected.