devilry_settings.testsuiterunner: Removed.

Not used anymore after Django 1.6 update. See #497.
devilry_usersearch: Do not instanciate EmptyQuerySet.

Required for Django 1.6. See #497.
Updated all "{% url ..." tags for Django 1.5 changes.

Used:

	$ git grep -P "{% url [^'\"]"

to find the templates needing update.

Required for #497.
devilry_developer.testhelpers.soupselect: Include nonbreaking space in

normalize_whitespace.
devilry_examiner...test_singledelivery: Use normalize_whitespace.

Required for #497.
devilry_qualifiesforexam: Updated tests for Django 1.6.

The tests run fine when executed one at a time, but not when executed
as a whole for some reason. #497.