Fix issue where merges would not show in signal

Issue: https://github.com/piquadrat/django-mailchimp/issues/18

Fix: Regex was having a small error so no merges was detected.
The __str__() method for objects now works with non-ASCII data. Fixes #21.
update import for Django 1.6 compatibility
Merge pull request #25 from fangsterr/master

update import for Django 1.6 compatibility
Merge pull request #22 from 2general/issue-21-non-ascii

The __str__() method for objects now works with non-ASCII data. Fixes #21.
Merge branch 'master' of github.com:piquadrat/django-mailchimp
added pagination for lists call in chimpy
version bump
django 1.6
Merge pull request #31 from jayfk/master

django 1.6