Self and other packet handlers, @ClientHandler, etc
Less keep alive packets
Merge pull request #25 from humanity/more-handlers

Self and other packet handlers, @ClientHandler, etc
Nothing much of substance, but it's got a question in *04Join
Add Server->Client player update system
Incremental -- WILL NOT COMPILE YET
Remove RemovedPlayersList because it was duumb
Clean up, clean up, everybody clean up!

Actually--this fixes the bugs that were made by the last commit.
Remove some unused packet that no one cares about