Change FloorType.ToString method to use AbstractElement's default, internal constructor for ReferencePlane allows setting different cutvector, view, new public constructor ReferencePlane.ByLineCutVectorView and fix ReferencePlane unit tests
Remove new ReferencePlane method based on consultation with Lev
Merge branch 'ChocoButter-2Become1' of https://github.com/DynamoDS/Dynamo into ChocoButter-2Become1