Fort Fights is now out of beta

- Changed the way how propflying protection works
--- Props grabbed with the physgun now won't collide with players until they are dropped
--- fof_kill_propflyers is now 0 by default
- New cvar:
--- fof_physgun_grabbed_props_dont_collide | Changes whether props grabbed with the physgun collide with the other players. (0=collide with players, 1=don't collide with players)
- Fixed the fof_map_voting_canvoteoncurrentmap cvar
- Fixed an issue where every footstep would print an error in the console on server side
- Fixed an issue where players could freeze props outside of their base
- Added developer hooks:
--- FOF_OnEntityEnteredBase(Entity ent, int baseOwnerTeamID)
----- Called when an entity enters a base (Note that this is also called when entities spawn inside a base)
--- FOF_OnEntityLeftBase(Entity ent, int baseOwnerTeamID)
------ Called when an entity leaves a base
--- FOF_OnRoundNewStart()
------ Called when a new round starts (Also called when the game starts waiting for players)
--- FOF_OnRoundEnd(int winnerTeamID)
------ Called when a round ends