Issue #1889. Generate addins directory.
Merge pull request #1901 from DynamoDS/CreateAddinsDirectory

Generate addins directory.
Added remaining Revit Samples to Automation

Added below four new tests, out of this one I marked as Ignore.

- Revit_Floors_and_Framing: This test marked as Ignore because on running it is throwing error from Revit side. if I run it manually there is no error. Will discuss this with Ian