UC generator update

I've done a minor update to the Unconventional Courtship generator, to allow you to select fandoms individually. There's now a tickbox beside each fandom — if you click on the fandom name it will select only that fandom, as before, but if you click on the tickboxes you can toggle which fandoms are included. So if (for example) you just want the characters from B5 and B7 with no intervention from Miss Austen, that should now be possible.

Let me know if you find any problems — it's quite possible I've introduced some heinous error. The encoding method I've used also means the generator will be limited to 31 fandoms maximum, though we're nowhere near that limit yet. ( Of course, I couldn't resist testing it... )