Fix crash when invoking Form.ByLoftCrossSections with null input.

Conflicts:
	src/Libraries/Revit/RevitNodes/Elements/Form.cs
Merge pull request #2458 from Benglin/master

Fix crash when invoking Form.ByLoftCrossSections with null input.
Disabled "heartbeatThread.Join" statement to avoid deadlock
Update the geometry binaries
Merge pull request #2465 from Benglin/master

Disabled "heartbeatThread.Join" statement to avoid deadlock
Merge pull request #2464 from Randy-Ma/master

Update the geometry binaries
Change vendor ID to ADSK.
Update vendor ID for msi installed addins.
Fix cherry-picking conflicts
Merge pull request #2474 from pboyer/TesselFixMaster

Cherry-pick RevitVisualizationManger improvements to Master
Update README.md
Merge pull request #2472 from DynamoDS/MAGN-4455

MAGN-4455 Reference point, model curves are not working on Vasari.
Update addin generator exe.
Merge remote-tracking branch 'origin/master' into Revit2015

Conflicts:
	extern/ProtoGeometry/ProtoGeometry.dll
	extern/ProtoGeometry/ProtoInterface.dll
	src/DynamoRevit/ViewModel/RevitVisualizationManager.cs