Make Test::random_movie_unsaved() use $movie, not $photo (no functional changes)
Remove extra \n in Comment_Event_Test.
Move Comment_Test tests to Comment_Model_Test where they belong.
They test the Model_Comment class, not the Comment class.  Also, remove the
saving/resetting of the IP address since it's no longer used anywhere.
Move two Tag_Test tests to Tag_Model_Test where they belong.
They test the Model_Tag class, not the Tag class.
Refactor existing tag tests - all still pass.
- use random names instead of blanking DB each time in setup().
- be more explicit with having two tags/items.
Add several unit tests for tag slugs.
Add Tags_Controller_Test to check that 3.0.x URLs are redirected.
Merge pull request #378 from shadlaws/fixes_20130601_2

Fixes 20130601 2