configure pg
add admin, firstname and lastname fields to Users
configure devise routes
only admin can edit, create, delete categories
product fields validations
calculate average rating
require presence and unique value for product name
require review fields to be set
require user to be signed in & own the product
display reviews author full name
assign review to user who wrote it
style top navigation bar and add links
require bootstrap JS
make navigation responsive, with toggle menu
modify devise views
style alert messages and top bar
create users (seeds)
add pictureurl to categories
add breadcrumbs
style categories index page (thumbnails view)