Bug 975239 - (Part 1) Choose a banner message at random instead of rotating through a queue. r=bnicholson
Bug 975239 - (Part 2) Request a home banner message when the HomePager loads. r=bnicholson
Bug 975239 - (Part 3) Refactor HomeBanner.handleMessage to handle being called multiple times. r=bnicholson
Bug 975239 - (Part 4) Don't show the banner again for the rest of the app lifetime after the user taps the close button. r=bnicholson
Bug 975469 - Remove sync promo banner from rotation after it has been tapped. r=bnicholson