Change GCRetain() and GCRelease() order
Merge pull request #2419 from ke-yu/fix_magn4605

Change GCRetain() and GCRelease() order in BuildInFunctionEndPoint
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Revit2015
Merge pull request #2421 from Benglin/Revit2015

Cross merge PR #2419 from "master" into "Revit2015"