* Refactor mailers
* Fixes for mailer
* Fixes for approving a quote
* Refactor emailer
* Refactor emailer
* Attach files with GMail transport
* Attach files to GMail transport
* Skip preview tests
* Fixes for product test
* Fixes for tests
* Update README.md
* Update README.md
* Update README.md
* Update README.md
* Fixes for incorrect payment types
* Refactor class nameS
* Entity Notification refactor
* Entity Notifications
* Add oauth_provider to User transformer
* Invoices can only be deleted in the balance in zero
* Fixes for null values in custom values
* Refactor mailing
* Working on send emails from GMail API
* Fixes for tests
* Test for GMail
* Adjustments for storing oauth token
* Update Exchange rate Data once a day
* Tests for currency conversions
* Fixes for tests
* Fix for adding blank product keys
* Class for logging emails sent
* Fixes for tests
* Fixes for testS
* Include credits in first_load=true
* Fixes for tests
* fixes for tests
* Fixes for tests:
* Fixes for tests
* Fixes for tests
* Fix whereClientId when starting payment
* Refunding using Paypal
* Refunding engine
* Cleanup and making refund method work
* Remove "refund" method from BasePaymentController
* Add "refund" to PaypalExpressPaymentDriver
* Extract refunding into own classes
* Apply php-cs-fixer to PaypalExpress
* Refunding with stripe
* Update Exchange rate Data once a day
* Tests for currency conversions
* Fixes for tests
* Fix for adding blank product keys
* Class for logging emails sent
* fixes for oauth
* Working on subscriptions
* Implement return type in models
* Subscription implementation
* Improvements to handling importation of large accountS
* Loggin imports
* Activate collector
* Improve memory usage of import script
* Quote actions
* Send Quotes
* Fixes for seg faults!
* Minor fixes
* Fixes for client contact scopes