Bump versions for django and DRF

[jbzdak]

Like #16, but bumps to newer versions.

Also dropped python 3.2 from tests, as python 3.2 is now EOL. Also Django 1.8 doesn't test against it:

Due to the end of upstream support for Python 3.2 in February 2016, we won’t test Django 1.8.x on Python 3.2 after the end of 2016.

[coveralls]

Coverage remained the same at 100.0% when pulling 8292db4 on i2biz:django_version_bump into e62f1f9 on JamesRitchie:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 4b34775 on i2biz:django_version_bump into e62f1f9 on JamesRitchie:master.

[hwkns]

Is this project still being maintained? Even with these changes (proposed almost a year ago, with not so much as a comment in response), all the versions of Django being tested against in this package are EOL. Django 1.11 is an LTS release and the oldest release that still has support, so I would suggest that as a bare minimum.

[JamesRitchie]

I haven't done any Django development for about 3 or 4 years now, so I've not really been keeping this package up to date. I might be able to allocate some time later this week to look at doing a proper dependency version bump.

[hwkns]

For anyone else following along, I would recommend https://github.com/James1345/django-rest-knox as an alternative package. It's a bit more secure, supports the latest Django versions, and also handles token expiration, although it might take more effort to drop it into an active production system with total backward compatibility.