Added speed entity effect.
Merge branch 'master' into Effects
Added SetWalkSpeed() to cMonster.
Added slowness effect and added entity support.
Fixed potion removing in creative mode.
Added GetWalkSpeed() and SetWalkSpeed() documentation.
Removed SexyMotd link
Merge branch 'master' into Effects
Renamed SetWalkSpeed() to SetRelativeWalkSpeed()
Merge branch 'master' into Effects
Added extra mushroom handler.
Merge pull request #1353 from mc-server/Effects

Added speed entity effect.