MP Improvements:
+ Log.broadcast(String) to make transmitting a message to all clients just a bit easier.
+ Fixed an oversight with the last update light positions.
+ Sdded commands: /kill, /kick
* Fixed armour slot icons
+ Reworked weather. It is now a separate clientside and serverside effect. The client part is visual but the server part determines block updates. Reduced the chance
for snow to spawn by about 90%. Weather now happens per chunk not per world.