Add ``ApplicationURLs`` inline form to edit ``Application`` profiles.

https://github.com/madewithbytes/us_ignite/issues/27

The owners can add up to 3 links to the ``Application`` profile.

The front end should be able to pull any detail from any
application and display it in the page, in a non-blocking way.

Refers #19.

Closes #27.
Removed unused test helper file.