Django 1.5 support, Admin interface & docs, backwards compat w/1.3.

Make django_nose optional, runtime generation of uri in example app
request instead of hardcoded port 8000, sqlite directory location
set depending on settings.py location, import absolute_http_url_re
tries Django 1.5 location first if fails tries 1.3 location, use
django's datetime field in models, remove KeyGenerator, use
keygen helper and some pep8 formatting.
![screen shot 2013-05-25 at 10 07 37 pm](https://f.cloud.github.com/assets/1649844/564959/7b4002ee-c5c2-11e2-8326-2e1354f9adbd.png)
![screen shot 2013-05-25 at 10 07 56 pm](https://f.cloud.github.com/assets/1649844/564960/7d87688a-c5c2-11e2-85e1-cbe3d2912d56.png)
![screen shot 2013-05-25 at 10 08 27 pm](https://f.cloud.github.com/assets/1649844/564961/7f73d908-c5c2-11e2-9260-9c65cacd02d9.png)