Restored: Project Britannia

I’ve finally gotten around to restoring the downloads for the engine — I’m calling it that — that served as the basis for two other well-known Ultima remakes: Project Britannia.

I’ve also updated the downloads to be what are, to the best of my ability to determine it, the latest versions of each file. (Principally, this means that the art, logic, and sound resource files are newer and larger.)