Important stuff
---------------
[ ] Something to move a character around.
  - [ ] Joystick input.
  - [ ] Event listeners for keyboard or joystick.
[ ] Map collisions?
[ ] Add scripting support (lua?).
[ ] Open several maps at the same time.


Editor
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[ ] File requester for maps.
[ ] Scroller/panner for maps.
[ ] Allow to modify maps.


Specs
-----
[ ] Write a map file format.
[ ] Add special zones to the map.


Architecture
------------
[ ] Tiler and Forge are almost the same, try to refactor them.