* Bounding box 3D
Working version of bounding box 3d with the ability to capture data in either kitti or nuscenes format. I'm going to remove it in the next commit. Just wanted to make sure that we have a commit for this
* BB3D cleaned up files
* Code commented.
* Comment fixes
* Everything appears to be work prior to code clean up
* Everything working before commit
* Cleaned up code
* Updated changelog
* Updated documentation
* Only report 3DBBs for visible, labeled objects
* Moved execution of labeler to OnBeginRenderering
* Now using rendered object info for occlusion
* Json serialization of boundingbox3d data