* Added doomednum disambiguation functions for all future supported games (the 7000 range is fully allocated)
* Allocated the 6000 range to "reverse translation" of Doom objects, giving them alternate spawn numbers in all other games.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2788 86ba831e-150c-0410-ab35-e06eaae15ed9