Now on PyPI

Hi,


This fixes #7 as you can now ```pip install tddmon``` and then just run `tddmon` from anywhere.
I added the nose collector to setup.py so that ```./setup.py test``` just works™.

Releases can now be done by incrementing the version number in ```setup.py``` and running ```setup.py sdist upload``` provided you are one of the package index owners. If you give me your PyPI username I'll add you to the owners ASAP.