Removed old prints, fixed collisions

Removed some old print statements I used for testing.

(Re)Added a commented out line to draw the player's rectangle

Fixed collision detection so you don't get "stuck" inside walls. Before
it would only "fix" it after you were already inside the wall (it would
restore your position...to inside the wall).

Now it determines where you will be if you move, and if it's inside a
wall, disallows it, otherwise you go ahead.