Change createGainNode to createGain
Change createGainNode to createGain

The spec says createGain: https://dvcs.w3.org/hg/audio/rev/4186aad8cbe6.  Chrome supports both, but Firefox only defines createGain.
srbala/limejs,squallyan/limejs,sjamog/Lime-Projects,sjamog/Lime-Projects,digitalfruit/limejs,Diaosir/limejs,oleg-kipling/limejs,srbala/limejs,Diaosir/limejs,wikieswan/limejs,wikieswan/limejs,GeorgeMe/limejs,oleg-kipling/limejs,srbala/limejs,sjamog/Lime-Projects,digitalfruit/limejs,Inframatic/theBasics,GeorgeMe/limejs,Diaosir/limejs,oleg-kipling/limejs,digitalfruit/limejs,GeorgeMe/limejs,squallyan/limejs,wikieswan/limejs,squallyan/limejs,Inframatic/theBasics