Remove some of the coffeescript compiler updates

Sorry, I couldn't merge cleanly nor cherry-pick.

Now that we have focus() it makes more sense.

rawgithub.com and raw.github.com serve files with different MIME types.  Chrome doesn't treat the MIME type served from raw.github.com as executable JavaScript, so the sample code provided in Creating-a-scene.html fails.  This patch changes the requested URL to make the sample code run correctly in all browsers.

OrbitControls wasn't good either.