TODO list, in order of importance:

 * Implement moving windows to other workspaces (see src/command.c)
 * When at the edge of a screen and wanting to change into the direction of the edge,
   i3 should switch to the next screen (if any) in this direction.
 * document stuff!
 * more documentation!
 * debian package
 * initial release

TODO for later™:
 * think of some IPC mechanism, implement it
 * a command for toggling layouts
 * a command for toggling workspaces
 * floating
 * do something about xpdf, it doesn’t use _NET_WM_STATE_FULLSCREEN (but size hints?)