Mysql support

Added support for MYSQL and SQLite.

Added settings files for each database type within the test Django project.

Updated documentation pointing out the limitations of django-fixtureless local environment support.  MySQL (using mysql-python) does not work with Python 3 (out of the box) and django-fixtureless will not have local support for testing.

Added documentation for setting up the different databases locally for testing.

Restructured the requirements.pip to have a directory containing separate requirement files - one for Python 2 (p2.pip) and the other for Python 3 (p3.pip).