Bugfixing:
1. Prevented the polling code from trying to update an object that has just been deleted
2. Prevented the polling code from updating the location of a scene object that's being dragged
3. Added thread-safe updates to the parameter panel
4. Refactored Decision Check parameter panel to bring it more into line with the standard Scene Check parameter panel
Merge branch 'master' of https://github.com/raphaeldisanto/Gestalt.git