added new version of stripe, removed the old one…
removed key ‘access amount’ as it is no longer used (selling courses is a closed feature)
removed reference to popularity in content sorting
there is now only one way to sort, and it is implicit
increasing the popularity of a course is a deprecated feature at this point
removing access amount and popularity - deprecated properties of the Content model class
customizing the stripe button/form
init file for the stripe_controllers module
added function that creates a new stripe customer/subscription

appends a customer id to the user in the database after a successful stripe api call
added some tests for the new_customer function