Agilezen integration

This is an agilezen integration. It operates in parallel with the Rally Integration, though as implemented only one of the integrations should be active at any given time due to only having one project list field.

This requires an additional python module to work with the REST calls:
http://docs.python-requests.org/en/latest/user/install/#install

complete details here:
http://www.kevinofalltrades.com/?p=45

The generic code was changed to use story.url instead of a hardcoded rally url. I did not have a rally login to test if the change still works with rally when stories are pulled down.

This includes the bug fixes posted in my master branch and pull requested earlier.