Use oauth'd API

Use the oauth api to submit votes and view the personalized homepage.

:eyeglasses: @madbook 
Agreed; we should amend the styleguide. (I can do it, unless that's something you're particularly interested in.) I'm okay with no whitespace around curlies, since it should be simple content anyway.

I prefer singles, since this is more like a javascript file; and choosing doubles leads to some ambiguity. For example, would `key={'page-comment-' + i}` become `key={"page-comment-" + i}`? If not, we end up mixing quotes within a single line, which seems kind of gross. I don't feel strongly, though, so if you have strong opinions, I'm willing to go with whatever.