use get_script_prefix instead of slash
start of test for prefix issue
fix test_force_script_name by using djangos set_script_prefix to override default prefix
Override UrlsJsonViewTest

The testserver is not actually running at the non root url
so we need to handle the view case differently.
move assertions out of try finally block
manually delete prefix instead of using clear_script_prefix for Django 1.4
Merge pull request #38 from randlet/force-script-name

Take FORCE_SCRIPT_NAME setting into account