An attempt to install cmo on a fresh Linux box gives me this warning messages with regards to setuptools, pip, and PyPI.
==> default: Cloning into 'cmo'...
==> default: /usr/lib/python2.7/distutils/dist.py:251: UserWarning: 'licence' distribution option is deprecated; use 'license'
==> default: warnings.warn(msg)
==> default: /usr/lib/python2.7/dist-packages/setuptools/dist.py:294: UserWarning: The version specified ('4515eb7') is an invalid version, this may not work as expected with newer versions of setuptools, pip, and PyPI. Please see PEP 440 for more details
Workaround
An attempt to install cmo on a fresh Linux box gives me this warning messages with regards to setuptools, pip, and PyPI.