indentation edits and copy pyrimid from contrib (where I had made some edits), removed so this wont happen again.

- Fixed the assignment of vertex groups for rectangular leaves. Fix thanks to pawel_xx
- Compressed the UI to make accessing the different parameters easier. Also, the tree is not rebuilt every time a new menu section is accessed.

Fixed a memory access issue on OSX due to getting bezier point's coordinates after a new point was added to the spline. This caused corruption of the tree model.

 - Added tracker and wiki URLs
 - Fixed usage of Matrix.Rotation

[[Split portion of a mixed commit.]]