add review feature

create a review model which has belongs_to relationship with profile.
add attributes user_id, profile_id, comment and rating to review
create a review controller which creates and destroys a review

If you're going to do them keep them so we can have the tests.  Which you will want todo. Our code base will be complex enough not to mention sending requests in curl each time you want to test an api feature will get old.....fast.