Updates to AST for drop downs.
Merge branch 'ChocoButter' of github.com:DynamoDS/Dynamo into ChocoButter
Avoid out of bound exception on WallType and FloorType.
Add journal files for starting a clean project or family.
Add constructor for FamilySymbol to support Family Type dropdown.
Merge branch 'ChocoButter' of github.com:DynamoDS/Dynamo into ChocoButter