fix active styles for mixin
First changes for moving interface of drum fx editing

Moved drum fx sliders to dedicated divs with buttons - very basic
styling
Adding compressor implementation
Modifying defaults and ranges for compressor
Removing compressor from main audio graph pending interface adjustments
Merge branch 'Compressor' into develop
Merge branch 'develop' into Drum-fx-styles
Fixing JSHint errors
Merge branch 'develop' into Drum-fx-styles
clean up jshint errors
clean up jshint errors
clean up jshint errors
Merge branch 'develop' into Drum-fx-styles

Conflicts:
	js/initInterface.js
Wiring up compressor
Adding transparent background behind modal window
Removing extra sub-panel
Merge branch 'Drum-fx-styles' into develop
Merge branch 'LFO' into develop

fixes #8