Add tox.ini for python2.5 thru python2.7
Convert list comprehensions to for-loops since the results aren't.
Some PEP-8 compliance.
Add support for Python 3.
Add some Trove classification tags.
Added absolute_import import to ensure Python 2.5 support
PEP8 compliance
Added TravisCI configuration YAML
Added TravisCI status badge to the README