* Fixes for converting a quote to invoice
* Fixes for deleting an invoice
* Payment Terms CRUD
* Payment Terms
* Push PaymentTerms back into the DB
* Payment Terms
* Payment Terms
* Create api docs for payment terms
* 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 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
* Appen Tags into emails - fix companygatewaytransformer
* minor fixes for name spaces, collector facade and composer version bump
* Fixes for invoiceworkflowsettings
* Add more context to support emails
* Working on Firing Subscriptions
* Minor fixes
* Fixes for gateway filtering
* Checkout Driver
* Fixes for invitations not being created in RandomDataSeeder
* Resend failed/quota exceeded emails
* Queue email tests
* Refund a client for a ninja account
* Adjust email quotas - hosted plan
* Fix inputs
* Workflow settings: Auto archive
- New InvoiceWorkflowSettings job
- Updated PaymentCreatedActivity to dispatch the job
- New 'Archivable' trait
- New 'archived_at' field
* Workflow settings: Sending e-mail to client with auto_send
* Workflow settings: Quotes
* Fix HTML markup
* Fix archive & sending
* Remove Archivable trait & migration file
* Change order of sending the events
