In contrast to the previous system, this does not require special-casing for Rocket builds and will work correctly for nightlies and other out-of-band releases. It also removes the requirement for games to adhere to a strict format of version string on Windows for the editor to be able to load them, since the new data is injected indepdendently of the default resource by UBT.
#codereview Robert.Manuszewski, Michael.Trepka
[CL 2111949 by Ben Marsh in Main branch]