CLUB-575, fixing signup errors
Merge branch 'develop' into feature/CLUB-575

Conflicts:
	bluebottle/bb_accounts/static/js/bluebottle/bb_accounts/controllers.js
CLUB-575
Update models.js
merging with dev
fix modal close by setting the tagName to null rather than '' and add close modal mixin for use in controllers
cleanup up FB mixin and remove references to FB in App - implement in projects extending BB
Merge pull request #664 from onepercentclub/feature/CLUB-575

Feature/club 575
Merge pull request #666 from onepercentclub/feature/CLUB-564

CLUB-564 fixes for modal
fix modal close after login
add name attribute for easier testing
disable reloading existing jwt token until we have fixed infinite redirect issues
add basic error message to login
re-add bootstrap for some modals and popups
add context for FB auth id and mixin FB to app - todo: we should be mixing in this class in projects which extend BB CLUB-569
update grunt packages
add basic flash message for site wide notifcation, eg logins CLUB-573
remove debug code CLUB-573
fix closing signup modal CLUB-567
update controllers/templates to use currentUser property now on all controllers