Refs #74 - Removing zc.buildout for DEV/TEST environments. WORK IN PROGRESS.
Refs #74 - Switched to tox as test-environment manager. Added flake8 to the test suite. Dropped python 2.6 tests. Makefile no longer creates a virtualenv.
Using tox in development environment. Makefile no longer uses buildout or virtualenv. Dropped tests for Python 2.6. Closes #74.