Added Kaminari for pagination of cats and reviews.

9 Cats per page on index, 3 reviews per cat shown.
minor styling and added (none) text if no description exists for cat
Shifted timezone to EST
Added pagination spec tests
updated TODO
updated TODO and README
cat pagination moved to controller
fixed feature spec tests
minor styling adjustment
put page values in controller, fixed show page slightly, fixed tests/factories
Merge pull request #20 from LaunchAcademy/aw-pagination

Added Kaminari for pagination of cats and reviews.