empire stuff

made e_karling frankish, removed the roman empire check for e_karling,
removed the culture for the hre to allow it to be a bit more fluid,
added the normal reqs to india for after its initial formation, made
carthage be called carthage, moved the golden horde to its proper place
in the file, made sure the empires with Empire in their localization
name use "short name" so the game doesn't call them the Empire of x
Empire, made the e_pirate only allowable by AI since it's landless (may
want to look at removing it all together if it's not actually used, same
with e_rebel)