upper.1 floor.
Remove bullet walls on upper.1 (they "felt" artificial) and added some new
"guards" in their place. Added a bit of light near the entrance and exit on
upper.1 as well.
git-svn-id: svn://svn.code.sf.net/p/crossfire/code/trunk/maps@3373 282e977c-c81d-0410-88c4-b93c2d0d6712