View All Categories

[joshdbarton]

As an admin I would like to see all the available categories so that I can choose to edit or delete one, or see that I should add a new one.

Given an admin is in the app
When they select the Category Management link in the menu
Then they should be directed to a page that lists all the Category names ordered alphabetically

NOTE: For the time being it is acceptable to treat all users as admin users. There is a future story about enforcing user permissions.