use forked jwt auth for django with code for refreshing jwt token CLUB-693
- updated login controller to use email as auth username and added jwt token auto renewal CLUB-693 #resolve
- use forked jwt / DRF module
Merge remote-tracking branch 'origin/develop' into feature/club-693

Conflicts:
	bluebottle/bb_accounts/static/js/bluebottle/bb_accounts/routes.js
	bluebottle/bb_accounts/templates/bb_accounts/_standard_login_form.hbs
Merge pull request #771 from onepercentclub/feature/club-693

CLUB-693 - jwt token renewal