hack in basic tox support
test against django 1.4 and django 1.5
simplify example_project a bit
move tests under package
silence warning about django urls import
try tox + travis

This was the best reference I could find on how to do this:
https://github.com/datastax/python-driver/pull/26/files
add django16 coverage to tox
Merge pull request #4 from crccheck/testing-refresh

Update testing strategy to use tox