Fix the remaining issues for MAGN-3785
Fix MAGN-3218 Walls created on first run are not cleaned up
Add a null check.
Check ref point is valid before rendering.
Merge pull request #1867 from Randy-Ma/magn-3218

Fix MAGN-3218 Walls created on first run are not cleaned up
Removed unwanted codes
Merge pull request #1855 from Randy-Ma/master

Fix the remaining issues for MAGN-3785
Removed various unreferenced variables as reported by compiler
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into Misc
Cleaned up ReferencePoint and fixed unit conversion issues, changed get_EndParameter to use 2014 API version, GetEndParameter
Tags in PII instrumentation shouldn't have spaces int hem
Remove old samples folder.
Move reorganized samples folder to top level.
Fix for samples folder copy.
Installer fixes

Remove commented "Types" section.
Remove creation of definitions and samples folders which are now in the
user's app data.
Adjusting Licence.RTF so it's readable in the about box
Merge branch 'master' of https://github.com/DynamoDS/Dynamo
Merge pull request #1873 from pboyer/RefPointUnitConversionFix

Fix for #1871, Refactor get_EndParameter -> GetEndParameter
Tests complete for new unit conversions
Refactor AssertShouldBeApproximately back to ShouldBeApproximately