Use django.conf.urls instead of deprecated django.conf.urls.defaults
Convert sort_fields_aliases parameter in SortHelper to a list
In Python3, since zip returns a generator, we need to create a list so that we can iterate through sort_fields_aliases multiple times
Add Python 3.3 and Django 1.6 to the Travis file
Update versions of Django 1.4 and 1.5 tested continuously
Update developemnt dependency versions in requirements.txt
Update versions of Django 1.4 and 1.5 tested continuously
Exclude Python 3/Django 1.4 in Travis test matrix
Use unicode_literals from __future__
Merge pull request #57 from mjumbewu/fix-tests

Fix failing python 3 tests