Webaudio rewrite

[felixroos]

based on this experiment I rewrote the webaudio package, with a simpler yet already more powerful api.

Changes:

• replaced wave with s (use waveform)
• replace adsr with attack, decay, sustain, release, now patternified
• replaced filter with cutoff / hcutoff / bandf
• added support for resonance / hresonance / bandq
• added support for pan, so jux(rev) now also works :)
• now ignoring velocity, using gain param instead

I also migrated the existing 3 web audio api tunes to the new api

finally, I also added a little trick to the params: it is now possible to wrap a primitive pattern by calling the param method without arguments:

n("0 1 2 3".add(2)).s('sawtooth') === "0 1 2 3".add(2).n().s('sawtooth')

this allows writing patterns in a more flat manner if desired.