Renamed Project into NoCheatPlugin, because the old name doesn't fit
it anymore.
Also added a first draft of Speedhack detection. Will log suspicious
behaviour.
Fixed another bug with ladders, if a player jumps onto them and holds
itself only with his hands (metaphorically speaking).
When walking diagonally over a pit, Minecraft elevates a little in the
case that you are going to fall down on one side. This special move is
now treated as valid.
