Configured pytest to run the tests.
Use relative imports.
Django 1.5 compatible url syntax.
Get ready for django 1.5
Fix a comparison bug.
Fixed the tests & fixtures.
Remove the project level __init__ file
Moved the demo project from example to demo to avoid naming clashes for the tests.
Fixed a downgrade bug.
Added the order detail template.
Merge pull request #17 from linovia/develop

Various fixes and Django 1.5 compat.