Specify ASM 220 for RevitNodesTests
Refactor ASM preload methods on path manager.

Methods should allow you to specify the version of asm you want to find,
and not look for every version internally.
User refactored methods in sandbox startup.
Cleanup
Change inheritance for ReferencePointTests

Must be a geometric test.
Change inheritance on AbstractElementTests
Update empty.rfa to 2015
Don't shut down the HostFactory.
Merge remote-tracking branch 'origin/Revit2015' into GeometryTestUpdates

Conflicts:
	src/DynamoSandbox/Program.cs
	src/DynamoUtilities/DynamoPathManager.cs
Merge remote-tracking branch 'origin/Revit2015' into GeometryTestUpdates
Merge pull request #2231 from DynamoDS/GeometryTestUpdates

Geometry Test Updates