Code review comment for lp:~rockstar/launchpad/codereview-js

This branch adds the ability to request a review from someone without having
to do multiple page requests. I used a page template fragment to do the
updates to the template, and I find this means I have less duplicated html in
the javascript.

To test, run the test_code_review.py windmill test

 reviewer beuno ui
 reviewer intellectronica code

Cheers,
Paul