Bug 929066 - Handle skew in HAWK requests. r=nalexander
Bug 951304 - Follow-up: Look better on tablets; improve interstitial. r=rnewman
Bug 956581 - Make FxAccountGetStartedActivity an AuthenticatorActivity. r=rnewman
Bug 951264 - COPPA support for Firefox Accounts on Android. r=rnewman
Bug 961184 - Show activity after signing in to account. r=rnewman

Also (partially) implements resending verification codes, but doesn't
yet implement resending after account creation.
Merge m-c to s-c
Merge m-c to s-c.
No bug: the OVERRIDE HOOK is stupid.