Added prettier for better linting

[hokei]

At long last. Most of these options I copied over from circulation-patron-web

[kristojorg]

Although I wonder why travis is failing?

[hokei]

I have no idea why it failed the last time, I hate it.

It's weird, not putting it in eslintignore was making it so that it was trying to lint those files. Aaah, I'll just keep them they're not hurting anyone haha