* Minor fixes for OpenAPI docs for clients
* Add fields to company transformer
* Padding email templates, system level and custom
* Minor fixes for email template subject
* Working on Email Templates
* Clean up User model, remove redundant permissions methods
* Implement Locale for API
* Implement Locale middleware for client routes
* Provide failsafe creation of invoice invitations
* URL Links for invitations
* open up route for invitations
* Set DB by Invite
* Set DB By invitation Key
* Tests for setting DB based on user email address
* Middleware for setting db by email address
* fixes for tets
* fixes for tests
* Tests for bulk actions
* Payments API
* Fixes for tests
* 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
* Fixes for tests
* add additional fields for company settings
* fixes for travis
* update company settings schema
* Disable client portal
* Client Portal middleware
* Working on client portal
* hide portal
* Implement notification channgels for User and ClientContact models
* Push notifications onto queue
* Force authentication if client portal is password protected
