Maze Doors and Textures

Slowly progressing towards a more complex and better looking maze. It's already easy to get lost - though you can always find a way out, as generation code is sooo lighthearted on the player. :) But heading the right direction. Little coding to include the doors into generation. tidbit's door models and texture and Zphr's new wall texture addition rounds up a real classy classic atmosphere. Thanks go out to them again! :)