Switch to M2Crypto and m2secret
Added Django 1.5 to test matrix
remove trailing whitespace
Add test coverage for session load/save
Expand tox.ini and include mock
Extends django-paranoia, bumps version for PyPI
add ENCRYPTED_COOKIE_KEY for isolation/security

Encrypting with SECRET_KEY is potentially problematic
because of how Django auto-generates it.
Made M2Crypto optional with a fallback to pycrypto
Made ENCRYPTED_COOKIE_KEY optional
Made django_paranoia optional
Merge branch 'master' of git://github.com/kumar303/django-encrypted-cookie-session into kumar303-master
Add mock to requirements.txt