Clearer chunking of each review

Hi,

I've proposed a few changes to more clearly chunk each review:

* put the footer info of each review into a div, and indented that to the same level as the body of the review
* moved the "N out of M found this helpful" next to "Was this review helpful to you", rather than right before the header
* made the header for each review more of a visual banner, to break apart the reviews.

I also changed the "Rate a module" text to "Rate a distribution", since that's what we're doing :-)