* Default to Huraga Green & update naming/URL
* Apply the code from the Orderbutton module that defaults to Huraga Green to all templates that request Huraga's color scheme. Replace incorrect setting.
* Replace some old references to BoxBilling and boxbilling.org with the FOSSBilling ones. Update LICENSE URLs.
* Fix broken test
Co-authored-by: Benjamin Aerni <belleaerni@gmail.com>