sky: make pct of slice as a remainder of fixed values
ufo: separate draw; give window a redraw
ufo: move redraw to nav; include plugs
sky: elem.bind + attached and detached checks
ufo: add window unloaded state for checking when its no longer needed
ufo: undo unload; sun: fix cage.off
ufo: add a background method to window, which goes on the content (now behind the chrome)
sky: box equals
sky: add path corners
orb: crank conversion needs to be deferred in case element moves
sky: svg resize to box
Merge branch 'master' of https://github.com/jflatow/sky