added XBox controller mapping for Chrome under Linux

[panzi]

The XBox controller has the same layout under Linux as under Windows (in Chrome - couldn't get gamepads to work with Firefox), except it exposes one button more: the XBox button. I just mapped it like this: into.xboxButton = raw.buttons[16]; I guess this button has a special function and cannot be used under Windows? Under Linux it's a button as any other.

Also I've fixed a typo (on one place raw was written as Raw), added missing semicolons (;) and limited the framerate of the example to 30fps in order to reduce CPU usage.

[inequation]

Sorry to spoil your fun, but... You put your code in the wrong file. ;) gamepad_uncompressed.js is just an intermediate file, changes should be made to gamepad_no_images.js and then build.py should be run. Check out my fork to see the differences, specifically commits 480b5b3 and 398ab39.