Timing information in ACs.
compile WIP
Avoid null reference exception.
AC batch creation node.
Make vasari geometry preview off by default.
Add some timer info to batch ACs.
MAGN-721 Fixes for state machine to pause and unpause correctly for visualization manager.
Extended Divided Surface to get divisions, set rotation, added properties and extended unit test
More tests for DSDividedSurface
working on custom ast production framework
Introduce BySelection constructors for existing objects and IsRevitOwned field on AbstractElement
Wrap invalid cast and null reference exceptions in more user-friendly message.
custom node ast compilation and instancing
Merge branch 'ChocoButterCompile' into ChocoButter

Conflicts:
	src/DynamoCore/Nodes/CodeBlockNode.cs
	src/DynamoCore/Nodes/dynFunction.cs
More refactoring and cleaning up of ElementSelector
Bat files for FreeForm and NurbSpline tests, fix for failing CurveLoop tests
Merge branch 'ChocoButter' of https://github.com/ikeough/Dynamo into ChocoButter
Quick Fix to ModelCurveTests
Merge pull request #755 from l2obin/MAGN-721

Fix for MAGN-721 Geometry should not be selected while window selecting.
Merge branch 'master' of github.com:ikeough/Dynamo