Added pytest and flake8 integration to setup.py
Tox now tests flake8 and pytest unittests. Tox tests pypy as well
Moved travis over to new style and test system
Changed CONTRIBUTING documentation to reflect new tool usage. Tox should remove the need for virtualenv's.
Added author email and name to package __init__
Include the readme in the index of sphinx documentation rather then as a seperate page. Also added pip installation note.