Added sprite image.
Removed old image files, implemented sprites.
Merge branch 'develop' of https://github.com/OpenGea/gea into develop
Social buttons limited to one per track.
continued working on sprite
Merge branch 'develop' of https://github.com/pheonix7117/gea into develop

Conflicts:
	web/assets/styl/main.styl
worked more on sprite. next button disabled for last track
Added click listener for album art in InfoWindow.
Merge branch 'develop' of https://github.com/cjking/gea into develop

Conflicts:
	web/public/index.html
Finished playing song from InfoWindow.
Merge branch 'develop' of https://github.com/kcho47/gea into feature/mapfilter
Fixed markerclusterer bug.
Merge branch 'develop' of https://github.com/kcho47/gea into feature/mapfilter