Fixed a typo.
AllVerbsMixin: call a method for all HTTP verbs

The dispatch method will extra the attribute specified by the
class attribute "all_handler", the default value of which is "all".
The dispatch method then calls this method, without checking what
the HTTP verb is. If "all_handler" is not specified (techincally
if it evaluates to False) then ImproperlyConfigured exception is
raised.

Tests are in tests/test_other_mixins.py::TestAllVerbsMixin.
Merge pull request #103 from ykalchevskiy/patch-1

Fixed a typo.
Merge pull request #104 from prasanthn/allverbsmixin

AllVerbsMixin: call a method for all HTTP verbs
If superuser, skip group check. Superuser has all perms and thus all groups.
PEP8 fixes.
remove unused import and PEP8.
superuser test for GroupRequiredMixin and entry into the changelog for upcoming 1.4 release.
Merge pull request #110 from brack3t/fix/superuser-grouprequiredmixin

Fix/superuser grouprequiredmixin
fix merge conflict with the other fix merged in today.