Add a test case for element binding when an exception is thrown
Members of "Core - List - Evaluate" are moved to "Core - List - Actions"
"Core - Logic - Conditional" are moved to "Core - Logic"
Adjust the level name if there is an existing level with the same name
Merge pull request #2860 from vmoyseenko/DUI-RemoveUnusualGroups

Remove unusual groups
Merge pull request #2876 from Randy-Ma/level

Adjust the level name if there is an existing level with the same name
Merge pull request #2852 from Randy-Ma/unit_test

Add a test case for element binding when an exception is thrown
Merge branch 'master' into Revit2015
Merge pull request #2899 from Randy-Ma/Revit2015

merge the master branch to the Revit2015 branch