* Client and System Notifications
* Fix for group settings currency not applying correctly.
* Split head out of design in order to reuse headers and footers
* export the designs
* Fixes for pdf_variables
* Working on emailing invoices
* Working on emailing and displaying email
* Working on emailing and displaying email
* Email invoices
* Fixes for html emails
* Ensure valid client prior to store
* Ensure client exists when storing an entity
* refactor for emails
* Design Transformer
* Include designs in first_load response
* Code cleanup
* Remove unnecessary save() on invoice
* Update copyright
* Working on Credit Repository
* Implement credits as a paymentable entity
* Add credit_id to transformer
* fix rules for update payment
* Fix random deleted_at keys in transformers
* Fix for password_protect check
* Fixes for missing company object in events
* Cleanup client balancing code
* Fixes for client balance
* Fixes for missing company variable
* Fix activity transformer to prevent multiple DB calls
* Update client paid to date job:
* Backup Invoice HTML when invoice is marked as sent and paid
* Store HTML of invoice when invoice was paid
* Fix foreign keys in db schema
* V2 Endpoints for Company Migrations
* Fixes for tests
