add customer_category
use jbuilder to render customer index json
show customer_category in show page
add ui-bootstrap (tooltip/popover)
add popover to customer_category in the index page
add customer_category to edit and new pages of customer
add customer_category index page
add new customer_category
add customer_category index json
add editing to customer_category
add destroy_category to customer controller
fix the header links
add destroying category route
Merge pull request #7 from tony612/add-user-category

Add user category