Merge pull request #56 from Randy-Ma/Revit2015

Merge the Revit2014 branch to the Revit2015 branch
Fix one failing test case
Merge pull request #58 from Randy-Ma/fixing_one_test_case

Fix one failing test case
Merge branch 'Revit2014' into Revit2015
Merge branch 'Revit2015' into Revit2016