changes in xenus 2

-Fixed door bug in episode 1 (noticed it yesterday)
-planning to add more health in episode 1 because there's not enough health
-episode 2 progress goes on and testing it takes me over 5-6 minutes woot!
@silver sonic:yeah it was first attempt to make e1 styled map for real... xenus 2 is little other because episode 1 is computeristic, episode 2 is E1M3 style/Outdoor/Toxic Cave and episode 3 will be mix of hell outdoor/base/and other themes in plan because i'm not working now on episode 3 before i finish episode 2