-  removed wired-acting autorelease call on TCPClientConnection
- fixed TCPClientConnection leak (and resulting Player and Chunk leak!)
- let socket leak (for now) to fix crash bug (I need to investigate more on this)
- fixed Player owner handling. Only the EntityManager should own Entities
- added chunk unloading code
- fixed chunk memory leaks
- fixed Block Singletons
=> Leaks down from 350MB per connection to 30MB per connection
- fixed small Player object allocation-leak