* Allow payment amounts to be partial per invoice paid
* edge case tests for payments
* Allow per invoice payment amounts and allow direct payments which simply credit a clients credit_balance
* Fixes
* fixes for template controller
* Default gateway as string
* Bulk actions
* Move currency_id back to settings
* Allow store and update currency ID
* Attach user to company_user
* Add / Detach company users
* fix for blank client settings
* Force all custom fields to strings
* Fixes for bulk actions
* Fix for client transformer
* Validation for portal domain -> url
* Portal Domain Validation
* Fix for CORs error where file download were being prevented by headers
* Fixes for CORs and File downloads
* give contextual error messages for invalid route actions
* Clean up LoginController for OAuth Testing
* Quote Actions
* Invoice and Quote Actions
* Fix for client currency
* Update API docs
* cleaning up migrations
* Fixes for tests
* fixes for tests
* Delete client contacts when soft deleting a client
* Fixes for actions
* Fixes for client portal localization
* Replace Invoice Ninja Logo with user defined logo and website URL in client portal
* Minor Fixes
* Refactor for invitations on invoices
* Fixes for settings
* Implement transformer for ClientGatewayTokens
* Add company_gateway_id to client gateway token transformer
* Fixes for client model
* Fixes for Number class
