Small changes
Some change to Entity.cpp

* Added comments to BroadcastMovementUpdate() and the collision tracer
Merge branch 'master' into fixes

Conflicts:
	src/World.h
Implemented suggestions
More comments!

* Also fixed a potential issue with position sending - if someone moved
slowly enough, their position would never be updated.
A tiny speed improvement in ApplyFoodExhaustion()
Merge branch 'master' into fixes.
A bit of reformatting.
Suggestions'd
Suggestions'd #2
Merge branch 'master' into fixes

Conflicts:
	src/Vector3.h
Merge pull request #927 from mc-server/fixes

Small fixes