Bug Fixes: ElumTools 2015.12, 2016.9, 2017.12

• Fixed issue with calculation results not being sent back to Revit with multiple instances of Revit opened.
• Fixed issue with the same element being exported multiple times when using the Calculate View commands.
• Fixed issue with combined calculation results not being sent back to Revit properly in certain cases.
• Fixed error occurring with daylight calculations and foundation slabs Calculate by View commands.