Veriety of fixes, additions

-Added Tile Tab for editor(not done)
-NPCManager now needs access to ItemManager
-Added PlayerWrapper.getName(), getID()
-Added arg for respawnAll() which allow for respawnAll can respawn just
dead players
-fixed player positioning bug when respawned
-changed players(default coop) team to 2 as it was the same as
zombies(1)
-Zombies now have a weapon(use of it not implemented)
-Fixed a bug where bullets collision is not happening