Add Subscription Bundle
Simplify command code. Fix service configuration.
Refactor Subscription Processing Scheduling
Add SubscriptionEvent and introducing some new Events (Subscription Process Success, Batch Start, Batch End)
Fix incorrect reference to shipping bundle (bad copy&paste)
Remove unused classes (added by mistake). Fix access validation. Button up integration with User.
Add missing license headers. Tweak composer config. Make form subscriber class configurable.
Updated authors & bumped sylius versions
Cleanup and other misc. updates from latest rebase
Version bump
Allow adding subscription from cart item form, and combined SubscriptionItem and Subscription
Subscription cart form frontend/UI
Changed subscription interval to DateInterval object, frontend, and some refactoring
License headers & minor cs
Refactored code to use SimpleRecurringSubscriptionType and validators working
cs and misc fixes