Various fixes in preparation for packaging for PyPI

Hey guys,

This PR includes fixes to directory structure and setup module that should allow proper packaging for PyPI. Most notably, the setup.py has been modified to include static assets and templates using the ``package_data`` argument, and the package name was changed to ``django-colors`` from ``Django Colors``. This should be sufficient for successful registration on PyPI (issue #1). The ``media`` directory has been moved to ``static`` as per issue #3.