CocoonJS fixes

* Don't rely on DOM existing for debug
* Use built-in font instead of Google Web Fonts
* Use MP3 for all audio, remove unused assets
Fix land sound when running
Move source files to src/, move all debug code into debug.js, don't include by default
Add bundle npm script
Blue buttons
Mobile updates

* CocoonJS fixes for button sprites
* Added down button
* Fixed position of flag
Fix bundle task, set correct name and version
Don't clobber land sound
Phaser 2.1.1, remove minified files
Retina support
Less floor tiles, helps performance on iPhone retina
Give X velocity when wall jumping
Add generic drawText() method, remove line breaks and manually calculate text position to fix text in CocoonJS
Remove element ID when creating game so canvas is appended to the body, fixed CocoonJS warning
Don't be retain on retina iPads
Re-add destroy of startText on reset(), removed accidentally