10-10 Update 3

Fixed several of those bugs, and discovered a few more!  Player object
will sometimes move off of Doors and into impassible terrain; other
times, the player object will simply hesitate.  Stairs are treated as
impassible terrain for the purposes of generating walls- this is kinda
cool behavior, except they should have one access point instead of none.
And the swipe/touch controls still suck and are completely unintuitive.