Update setup.py dependencies
Update setup.py dependencies

This package depends on the YunoJuno fork of semantic_version (until
our patch is merged), and so have updated the dependency_links to point
to our github version.

This also means that it needs to be installed with the
--process-dependency-links option:

    $ pip install django-package-monitor --process-dependency-links

yunojuno/django-package-monitor,yunojuno/django-package-monitor