adds css for nonfluid tables #30
pretty up show template; add user reviews and ratings; edit only if users book #30
adds show or edit partial for reviews #30
adds update method to reviews controller #30
tests for inline review editing #30
review crud create #30

create new review; add user_review to book model; edits to show book;
add partial for reviews; add hidden fields to review fields partial;
clear up show_or_edit partial
add specs for inline reviews #30