ProtoToRevitCurveTests fixes
Hide the clashing methods, ToString methods for AbstractElement, add AbstractGeometryObject with ToString methods, remove CurveLoop from Solid.ByExtrusion
Make AbstractView not Browsable
Fixed merge failure in Selection.cs
Add DSCoreNodesUI and DSRevitNodesUI libraries.
Merge branch 'ChocoButter' of github.com:ikeough/Dynamo into ChocoButter
Removed unused references. Don't copy RevitAPI local on DSRevitNodesUI.
Remove unused reference from DSFace.
Update DSRevitNodesUI project to point to correct RevitAPIDll.
Fix RevitAPIUI variable in proj file.
Renaming DSElementSelection DSSElection. Rename revit tests.
Convert list of selected element ids to ExprList.
Merge pull request #927 from ke-yu/ChocoButter

Generating AST nodes for custom node