Use /people/me instead of /people/me.json

/people/me is the official API endpoint. I'd like to remove support for having a file format (.json) in our api urls because of some other problems it's causing. Blaggregator is the only app using *.json and that's because I mistakenly told you to use it. I'm fixing my error now :)
Merge pull request #59 from davidbalbert/patch-1

Use /people/me instead of /people/me.json