Updated the wiki with info about the new Reverse Herringbone seats.

These are installed so far on 787-9s from ET-AXS onward and A350s from ET-AYA onwards, but supposedly will be installed on those aircraft who have had seats stripped out as pax freighters. Presently installed on 4 aircraft (AXS/AYA/B/C) of which only AXS is in regular service though.