Bug 918012 - Pre: Fix test URLs.
Bug 918012 - Pre: Add debug helpers to JSONWebTokenUtils.
Bug 918012 - Pre: Implement Sync 1.1 key bundle generation in FxAccountUtils.
Bug 918012 - Part 1: Add FxAccountAuthenticator.addAcount(email, uid, ...).
Bug 918012 - Part 2: Add FxAccount.
Bug 918012 - Part 3: Sync with FxAccount and token server.
Bug 918012 - Review comment 1: Factor out delegates as inner classes.
Bug 918012 - Review comment 2: Break out FxAccountSetupActivity.
Bug 918012 - Sync with FxAccount and token server. r=rnewman