WindowClosing no longer shuts down DynamoModel in test mode
Merge pull request #2576 from Benglin/Revit2015

Cross merging master changes into Revit 2015
Merge pull request #2575 from Benglin/BuildFix

Fix various failures in recorded test cases
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Revit2015