tabs.
tabs, a bit more. WARNING: empty feature collections kill the map.
Compressing UI
add 'active' class to active tab
Added OverlayTab Options
Merge branch 'develop' into feature/sbCompress
cleaned up routing
Merge branch 'feature/sbCompress' into develop

Conflicts:
	app/views/ui.js
toggle visibility of overlays
switched remoteStorage to opt-in, instead of always-on