Add views.mixins class docstring
Wrong import (extra .db)
Missing function call (missing parenthesis)
Fix test for get_url_namespaces (with no_content_types=True)
Add test for get_url_prefix()
Add Django mixins (and base View) to *AutoPatternsMixinTestView

(needed to be able to call as_view)
Fix get_url_patterns (wrong list append, missing return)
Fix URL pattern computation
Add test for get_url_patterns()