Transgender category

Hey Ben,

This is my first contribution to an open-source project, so please forgive me (and correct me) if I've committed a faux pas anywhere.

I noticed the trangender category sitting in your sexuality_gender.js was empty, so I filled it up for you. I don't know if there's anything that needs to be changed to fit it into the plugin beyond creating the json list. If so, I hope it's not too much to ask that you add it. Or just let me know where I should be looking to add it myself.

I also noticed that LGBT Nondiscriminating was pretty focused on the L and G. So I added some questions on transgender non-discrimination. If I can find any that relate to bisexual non-discrimination in particular, I'll be happy to add them in as well.

Hope you don't mind me queering up the plugin!

—Maura Hausman