Patch notes - version 0.91

IOS6 LFO workaround, sound settings fixes and improved UI 2012-12-28

Sound

Workaround found for lack of implicit summation of input signals to params on IOS6 - do the summation on the input of a gain node with gain 1.0, and connect the gain node to the param.
New sound - ipadimpa to demonstrate the workaround.
dest - the destination route of an audionode output - is now an array called dests. This enables multiple outputs per node. (fanout)
Descreased decay, release and sustain on square and noisy bass. Sounds better when playing on a midi keyboard.
A flag on nodes called src. Can and should be set to true if the node is an AudioSourceNode. The synth will then call noteOn / start when the sound starts playing.
Polish notation expression parser for parameter values. Can use variables (f)requency, (v)elocity and (t)ime
First attempt at making a convincing piano sound. Sounds good from far, but far from good. Uses a additive synthesis with a "WaveTable" oscillator. The wavetable is not configurable yet though.

More than one output can now be configured in the sound settings UI.
Envelope graphs in the UI are now updated correctly when the preset changes, or when a different envelope is selected.
The adsr envelope UI is now generalized to a "details view". One thing at a time is visible here, and the view is not limited to showing envelopes.
Graphical representation (mostly fake) of approach envelopes. SVG programming was way more annoying than I imagined.
A new slider mapping similar to the existing log2/exp slider, but not limited to positive values.