- Replaced more Dynamic types with proper defs from the js.html and js.html.audio packages
- Implement audio .play updates (offset+duration options) for HtmlSound (IE9 etc)
- Fix (Firefox) issue in WebAudioSound createGain/createGainNode (an odd access violation on an __id__ property after adding 'untyped' in ternary op)
fixed previous createGain issue... wrapped the 'untyped ctx.createGainNode()' in parentheses.