fixed crash when clicking invalid watch element
Merge pull request #1865 from Steell/Revit2015

fixed crash when clicking invalid watch element: MAGN-3708
Merge remote-tracking branch 'origin/master' into Revit2015
Merge branch 'Revit2015' of https://github.com/DynamoDS/Dynamo into Revit2015
Merge remote-tracking branch 'origin/Revit2015' into R2015-071-RC
Materials manager to create a revit material.
Merge remote-tracking branch 'origin/master' into Revit2015
Reset materials manager on view switch.
Fix for disabled run on document switch.
Fix for disabled run on document switch.
Merge remote-tracking branch 'origin/master' into Revit2015
Merge remote-tracking branch 'origin/Revit2015' into R2015-071-RC
Revert "Move alternate context drawing menu item to Debug."

This reverts commit 77bb4a3e1884a156d7951e50a43969f7c5ee409a.
Merge remote-tracking branch 'origin/Revit2015' into R2015-071-RC
Merge branch 'R2015-071-RC' of https://github.com/DynamoDS/Dynamo into R2015-071-RC