django.conf.urls.defaults is deprecated
django.conf.urls.defaults is deprecated
delete .svn
translating error messages
Add tests for double ticket validation.
Merge remote-tracking branch 'gstrat/elep' into elep

Conflicts:
	cas_provider_examples/simple/urls.py
Add Django migrations.
Can't have ForeignKey from PGT to ST, if ST is deleted immediately.
Move unit tests out of the app.
Add tox configuration (tox 1.8 needed),
fix requirements and package discovery in setup.py.
Test: Remove unnecessary and unsupported in Py2.6 `namespaces` arg for ET.find
Compatibility fixes.

* Use unicode_literals thoughout the package.
* Add indexes to '{}'.format(), unindexed version unsupported in Py2.6.
* Remove remnants of Python 2.5 support (Django 1.5 is required anyway).
* Stop relying on `hasattr` on OneToOneField, won't work on Python 3.2 + Django 1.6
  (see https://code.djangoproject.com/ticket/21563).