created a comment model
added the comment model and fixed a bunch of review stuff
Merge pull request #15 from lauyeung/create-comment-model

Create comment model -- looks great
made it so non-user can view reviews
unauthenticated user can not create review
erased save_and_open_page
Reviewer can update their review
added comments to the gem show page
Merge pull request #18 from lauyeung/create-comment-model

added comments to the gem show page
removed compass rails from gemfile
Added tests that confirm a non-authenticated user can't review a gem or comment on a review.
Merge pull request #19 from lauyeung/check-foundation-without-compassrails

removed compass rails from gemfile
User can edit their review.
Merge pull request #17 from lauyeung/edit_review

Edit review - The ability to update review
Resolved conflicts.