Added alpha GUI

Created proto-GUI with all functions except reverb.  Is currently
non-functional, but an hour or so of boilerplate work plugging in values
to play.js will do the trick.
Merge remote-tracking branch 'upstream/master'
.gitignore changes

nothing to see here, folks.
alpha GUI complete

- reverb needs to be developed - maybe with a local .wav?
- filter Q values need to be brought into compliance with Web Audio API
specs.
- next step: add custom waveform functionality
make it prettier

- organized GUI
- combined js files.
Merge pull request #5 from bignimbus/master

Alpha GUI