Cleanup pexp commands, remove direct settings import
Convert Django project files in the root to example project.

Move pexp project to 'example' folder too.
Remove polymorphic_dumpdata command and assorted scripts.

The polymorphic_dumpdata command carried a deprecation note for a long
time now. The scripts for testing python versions are replaced by tox already.
django.conf.urls.defaults is deprecated; use django.conf.urls instead
Add runtests script

Allow `python setup.py test` too.
Fix tox invocation now that `manage.py` has moved.
Use self.assertEqual() in tests instead of assert statement.
Merge pull request #29 from julianwachholz/master

django.conf.urls.defaults is deprecated
Replaced the doctests with unit tests

Making debugging tests much easier. The same repr() logic is preserved,
so this is essentually a huge coding style change.
Tests: remove Django 1.1 compatibility check
Tests: auto removed unused imports
Tests: make old code more readable
Tests: fix missed error in last commit

(cannot amend, already pushed for review)
Merge pull request #30 from vdboor/cleanup_for_15

Cleanup before porting to Django 1.5