* Added payment to groups and pay with group plan with Stripe
* Added edit card for Stripe
* Added stripe cancel
* Added subscribe with Amazon payments
* Added Amazon cancel for group subscription
* Added group subscription with paypal
* Added paypal cancel
* Added ipn cancel for Group plan
* Added a subscription tab and hid only the task tab when group is not subscribed
* Fixed linting issues
* Fixed tests
* Added payment unit tests
* Added back refresh after stripe payment
* Fixed style issues
* Limited grouop query fields and checked access
* Abstracted subscription schema
* Added year group plan and more access checks
* Maded purchase fields private
* Removed id and timestampes
* Added else checks to ensure user subscription is not altered. Removed active field from group model
* Added toJSONTransform function
* Moved plan active check to other toJson function
* Added check to see if purchaed has been populated
* Added purchase details to private
* Added correct data usage when paying for group sub
* fix(subscriptions): round up months
* fix(subscriptions): resub improvements
Don't allow negative extraMonths; flatten new Dates to YYYYMMDD
* fix(subscriptions): remove resub Gems exploit
Also standardizes some uses of new Date() to remove potential race condition oddities.
* fix(subscriptions): bump consecutive months...
...even if the user didn't log in then, if subscription has been continuous through that period
* test(subscriptions): cover fix cases
Also refactor: use constant for YYYY-MM format
* refactor(subscriptions): don't stringify moments
