More names and backer name genders

Continuing from discussion here: http://smf.cataclysmdda.com/index.php?topic=5809

This is an updated en.json with a good many thousand unique given and family names added in, plus genders assigned to backer names to prevent clearly male names from appearing on female characters.

This still leaves the matter of the flat chance of backer names being chosen over generated names an issue, and even exacerbates it for female characters, as with that system every time a backer name gets selected, it gets pulled from a much narrower list of names. I still can't compile the game whole to see what can be done about that (altering the backer/random name distribution et al), but in the meantime this should provide enough random names that any time a random name ends up being selected, you're almost guaranteed a unique one.