User Story 39, Merchant Index Page

[iandouglas]

As a visitor
When I visit the merchant's index page at "/merchants"
I see all merchants in the system who are active
Next to each merchant's name I see their city and state
I also see the date they registered

DO THESE STORIES FIRST:

• User Story 2, Visitor Navigation

Checklist:

• base tests are written
• base code is written to pass tests
• edge case ("sad path") tests written (if required)
• edge case code written (if required)
• code is reviewed
• branch is merged
• all tests still pass

child of #78

child of #125

depends on #122