map-test-doors by cu-kai

This is a map for testing door entities, and so-called "button puzzles".

Each door / room is numbered as follows:

func_door:
1. automatic sliding door
2. button operated sliding door (including a floor-button which must be damaged to operate it)
3. trigger volume operated sliding door (simply enter the trigger or build something within it)

func_door_model:
4. TODO
8. TODO

func_door_rotating:
5. automatic rotating door
6. button operated rotating door
7. trigger volume operated rotating door (same as above)

