Installation is broken for me by:
changeset:   4963:cdfb1a3fb56f
user:        John Kristensen <john@jerrykan.com>
date:        Tue Feb 10 14:08:01 2015 +1100
summary:     Fix setup.py to allow "development mode" (issue2550866)

During installation on Debian wheezy I get:
/usr/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown
distribution option: 'entry_points'

The result is that scripts are not installed into bin, so no
roundup-admin, no roundup-mailgw, etc.

A short search shows that to use this option, you need to use
setuptools, not just distutils. I haven't tested if installing
setuptools helps, but as this would be a new requirement, this should
not be introduced lightly.