rotate "Turn screen" message 90 degress so it's only readable in landscape.

Watching people they would not read the screen. Here's hoping if they
have to rotate it to read it they'll get the point?
fix dpad.js so it can use clientWidth, clientHeight for size
update boomboom for ios 6
update audio.js to handle old Web Audio API for iOS6
adjust powpow css for ios6
adjust jamjam css for ios6
fix samples.css for ios6
fix shootshoot css for ios6
fix shootshoot controller so it uses clientWidth, clientHeight for dpad size