Handle FxA sign in from email (bug 1080868)
Update based on comments
Don't call consumer_info anymore if not necessary (bug 1081018)

It's only necessary if we don't know the user region (consumer_info
API will do geoip) or if the user is logged in (consumer_info API
contains the list of apps he's installed/developed/purchased)
Merge pull request #713 from diox/avoid-consumer-info-if-unnecessary

Don't call consumer_info anymore if not necessary (bug 1081018)
Merge pull request #714 from mstriemer/login-from-email-1080868

Handle FxA sign in from email (bug 1080868)
ms ~> msg
Do the same thing after FxA login as Persona login (bug 1072408)