[WIP] port profile page to backbone.js

this will port the javascript on profile pages
`/people/[guid]` and
`/u/[username]`
to use a backbone view.

Not finished, will create a backbone model in order to handle rendering more gracefully,
also, the persons stream doesn't show at this stage.
I thought it might be ok here, since w/h and s/m/l are in a context that doesn't leave much room for interpretation.