Merge pull request #232 from bvssvni/master

Moved FPSCounter to separate repo
Merge pull request #234 from bvssvni/master

Moved AI behavior tree to separate repo
Removed AI behavior trees from README

Closes https://github.com/PistonDevelopers/event/issues/235
Merge pull request #236 from bvssvni/master

Moved tests to piston-ai_behavior
Replaced fail with panic macro
Merge pull request #237 from leonkunert/master

Replaced fail with panic macro
Fixed missing docs warning