Use the jsonfield as requirement
Added form field for multiple creation of new participants. Fixed #178.
Merge pull request #1174 from ostcar/json_field

Use the jsonfield as requirement
Merge pull request #1175 from normanjaeckel/MultipleParticipantsForm

Added form field for multiple creation of new participants. Fixed #178.
Added AbsoluteUrlMixin and used it in any model.

cleaned up get_absolute_url() in some models
Merge pull request #1172 from ostcar/get_absolut_url_mixin

Added AbsoluteUrlMixin and used it in any model.
Added a poll description field for each assignment poll

fixed signals in MainMenuTests