Many bug fixes, streaming while backgrounded.

Login bugs fixed. Can now login using facebook, and activity indicator
is made visible when webview is navigating to new page.
Menu bar is not shown when swipe down from the top bezel if user is not
logged in.
Added alert for when track is unable to load (error 2032).
Added runinbackground permission to bar xml file, fixes music stopping
on standby bug.
Track position label is now centered horizontally.
Changed background color of Feed and Profile views to light shade of
grey.
List item renderer for listing users no longer shows gaps between items.