Moved tutorials - no more numbered folders!
Merge branch 'master' of github.com:eightyeight/t3d-bones
No more numbered tutorials.
onExit now happens in root main.cs.

This is a change I introduced when making vlrtt. It just makes sense for
main.cs to handle the datablock and server object cleanup, as well as
having symmetry in ame code between onStart and onEnd.