Fix a failing test on Django 1.5.

It was failing since I added a default context with a few constants.
Add tox.ini.

Currently this targets Django 1.4 & 1.5 on Python 2.6 & 2.7 as we'll
drop support for Django 1.3 and Python 2.5 in the next release.

Python 3.2 & 3.3 isn't supported yet.
Merge pull request #409 from aaugustin/add-tox-file

Add tox.ini. Fix #407.
Update versions of JavaScript libraries.

Use Google's hosted libraries instead of vendoring. This is just for
testing purposes and browser caching will help after the first access.
Remove unecessary template.
Update the example app with a modern project template.
Add a link to the admin.
Add a README for the example project.
Ignore database for example project.
Merge pull request #408 from aaugustin/modernize-example-project

Modernize example project. Fix #406.
Add myself to AUTHORS.
Recommend installing with pip.

Thanks rogueleaderr for the suggestion.
Fix a few issues in the updated example project.
Catch exceptions liberally when looking for sources.

Fix #279.