TribalWarz Iteration 34

-Moved GameChanger and RainCats commands to a different package, so they
may be singled out easier. I may remove these soon entirely from the
plugin.
- GameChanger and RainCats commands are no longer used within the
Plugin.yml, so you cannot use them ingame.
- Deleted the Anti-Grief listener class, as it was never going to be
used..
- Updated to 1.5.1-R0.2!!!