Room infection

Monsters will now spread from room to room!
every 10 seconds a monster will spread (atm the danger level was set to
2, so the monsters will spread), monsters however will not leave the
current room, so you will see them pile up in there (the actual time of
course wont be 10 seconds, its more just to see it in action).  Monsters
can attempt to spread to locked rooms, instead of entering, they will
dmg the lock

BUGS:
since monsters are not being spawned high enough, they are going through
the floor, im going to increase the door sizes and since the monsters
are currently bigger than the doors