More fixes and changes

Few map fixes and changes
Extra protection against voiding
Fixes #19 - Vaults will unload after 5 seconds of last person exiting them 
Fixes #22 - You can no longer gain points in house wars during round setup
Fixes #24 -  Evanesco will no longer work against flying players 
Fixes #36 -  Text output of spells/items can now be seen by invisible people 
Fixes #30 -  Freeze Area now unfreezes if already GM frozen 
Fixes #38 -  Deatheater PMing someone who has full inbox will no longer reveal them