Add basic audio system
Add audio tracks
Hook up the rest of the game to the audio system
Remove wav tracks
Pull audio loading into a new file
Add bits for multi-layer music
Update loader messages
Add music to levels
Use ffmpeg to convert audio as part of build process
Tweak audio volumes & gulp task
Increase audio quality a little
Add sound mute option
Add settings page ui
throttle saving settings to localstorage
Hook up settings to audio system
Remove dodgy death sound
Override font awesome loc.
Use new form
Merge branch 'master' into staging
HTML ext.