Upgrade to latest playdoh-lib and Django 1.5.5.

Upgrade django-smuggler to 0.4.1.

SECRET_KEY cannot be empty.

Return iterable when mocking filter().

ALLOWED_HOSTS must be set in production.

Default Template Foreign Key should be None for migration.

Add client to TestCase.

PEP-8 fixes.
Merge pull request #46 from glogiotatidis/upgrade-django

Upgrade django