Please build python-cssmin for epel7 so it can be used on el7 boxes through epel.
python-cssmin-0.2.0-3.el7 has been submitted as an update for Fedora EPEL 7. https://admin.fedoraproject.org/updates/python-cssmin-0.2.0-3.el7
python-cssmin-0.2.0-3.el7 has been pushed to the Fedora EPEL 7 testing repository.
python-cssmin-0.2.0-3.el7 has been pushed to the Fedora EPEL 7 stable repository.