PyKronos setup.py and README.md

Summary:
setup.py works: if you type `sudo python setup.py install`, it will install pykronos.

I haven't tested uploading this to pip, but we should get Kronos working with this before we actually try submitting a new project.

The docs aren't done, but I wanted you to have the setup.py stuff already.

Reviewers: usmanm

Reviewed By: usmanm

Differential Revision: http://phabricator.locu.com/D5371