Rename class member packet to mPacket
Speed up creature pickup/drop/marking tiles/build room/build trap
Fixed crash when restarting a game after destroying a treasury room
When picked up, creatures are no more removed from gamemap
No need to use unique number for Battlefield. As there is 1 per creature, we can use the creature name
Use the names given by the server on client side for all entities instead of using synchronized unique numbers
Fixed a small bug with rendered scene node for missile objects
The room now deletes itself when it is destroyed like most other entities instead of being managed by the gamemap
Use of room objects for treasury indicator
Merge pull request #111 from Bertram25/development

A few things ;)
Merge pull request #109 from hwoarangmy/development

Speed up creature pickup/drop/marking tiles/build room/build trap
Renamed Single Player to Skirmish mode & corresponding gui and code changes.

Part of #6