Test against python3
Update test-utils and django-nose.
Adapt code to python3

* Necessary code changes
* Update jingo version for py3 support
* Add python 3 classifiers
* Remove test_utils dependency of test suite since we're not using most of the features,
and keeping it as dependency will not help python 3 porting, we can do it.
Don't pin Django version for dev
Merge pull request #113 from jsocol/py3k

Py3k
Use print_function in mgmt cmds
Drop u string prefixes.
More test environments.
Fabfile is still useful sometimes.
Drop one last u''
Merge branch 'master' of https://github.com/jsocol/django-waffle