wait until signalling is open/online before host sets key (unnecessary but consistent)
update how fullscreen works; change casing of `FullScreen` to `Fullscreen` (per Fullscreen spec)
nobody likes long lines
fix jiggling in Firefox when using controller with keyboard (fixes #96)
remove dotted outline around buttons (fixes #98)
make NES controller a wee bit responsive (fixes #100; related to #101)
remove unneeded commented CSS line
add a debug display for on-screen logging
close WS connection to signalling server before host/client leave page (fixes #99)
hide debug screen when empty
fix up host command to send `bye` message in `beforeunload`; rearrange order (related: #105)
hook up events (fixes #44); improve singleton pattern (#79)
OMG get Keen actually working nicely with gamepad (aah, nostalgia)
Merge pull request #111 from cvan/raf

hook up events; hook up functional gamepad to Keen
rename `CONTROLLER_` settings to `GAMEPAD_`
add screenshot of traditional gamepad
update button usage in README (fixes #42)
credit author of NES controller CodePen in README
add FullScreenMario to `.gitmodules`