Dynamo Addin Generator

This pull request is for the addition of a utility to generate addin files based on the Revit Products and dynamo installs on a user's system at run-time. The DynamoAddinGenerator.exe now runs at the conclusion of the install. It deletes all existing dynamo addins and generates new ones. This pull request also updates the Dynamo install location to <Program Files>\Dynamo 0.7.

The addin should check for the following install locations:

C:\Autodesk\Dynamo\Core (0.6.3)
C:\Program Files(x86)\Dynamo071 (0.7.1 - before we fixed the x86 folder issue)
C:\Program Files\Dynamo071 (0.7.1 - after we fixed the x86 issue)
C:\Program Files\Dynamo 0.7 (0.7.x - install location as of this PR)