mcenderdragon: bugfix: added null check so optifine no longer crashes us with a null world, closes #568
mcenderdragon: fixed spelling mistake
mcenderdragon: bugfix: air caps also could crash by null world, fixed that
mcenderdragon: FPSelectorHelper no longer keeps forever in world.eventListeners as its now a weak reference
mcenderdragon: calculation modul is now storing next request so it will calculate 100% of the time.