Change the file generating the structure of the artist#show page from a global layout to an artist-specific partial.
Remove filter controls from the artist#show page, since the bounty displays should be fixed.
The artist#show page now only links to the dashboard if the owning artist visits.

This change allows a large amount of streamlining in the artist#show
view. Now the view is only focused on displaying the artist's details
and doesn't need to concern itself with the dashboards beyond showing a
link to them if the owning artist visits the page.
Add tests for artist#show page functionality.
Fix an artist#show test that should be failing but was passing due to a bug in the test.
Comment-out the Omniauth debug settings allowing a visitor to log in as a specific user without authentication.
Correct some problems with the Bounty#edit integration tests for submitting blank values. Fixes #70.
Merge branch 'master' into artist-user-dashboard