fix server box model unit test
added test for recurly url method on user model
add getSubscriptionAdminURL to User model
add /api/:username/subscription/billing API endpoint to redirect users to Recurly hosted admin page
add link to user menu allowing customers to edit their billing details
Fat arrow fix.
Merge pull request #547 from scraperwiki/20140312-recurly-admin

Allow paying users to administer their own Recurly account