* 14/02/2016 Added COP currency
* 12/02/2016 Group booking functions
* 05/02/2016 Auto account payment via credit card
* 16/12/2015 Reorder some booking page menus
* 13/12/2015 Yield management rules can be disallowed for channel management.
* 04/12/2015 Added VND currency
* 29/11/2015 Overbookings shown in potential issues on support page
* 28/11/2015 Invoice date assigned with invoice number