py26-roman: missing dependency on py26-setuptools

[macports@…]

Upgrading py26-docutils pulled in the new 'py26-roman' port.

Building this failed:

--->  Computing dependencies for py26-roman
--->  Fetching py26-roman
--->  Attempting to fetch roman-1.4.0.tar.gz from http://pypi.python.org/packages/source/r/roman/
--->  Verifying checksum(s) for py26-roman
--->  Extracting py26-roman
--->  Configuring py26-roman
--->  Building py26-roman
Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_python_py26-roman/work/roman-1.4.0" && /opt/local/Library/Frameworks/Python.framework/Versions/2.6/bin/python2.6 setup.py --no-user-cfg build " returned error 1
Command output: Traceback (most recent call last):
  File "setup.py", line 1, in <module>
    from setuptools import setup
ImportError: No module named setuptools

Error: Problem while installing py26-roman

Installing py26-setuptools first fixes the problem.

Note that there is then a file clash with py26-docutils:

--->  Activating py26-roman @1.4.0_0
Error: Target org.macports.activate returned: Image error: /opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/roman.py is being used by the active py26-docutils port.  Please deactivate this port first, or use 'port -f activate py26-roman' to force the activation.
Error: Problem while installing py26-roman

I am CC-ing the submitter of py16-roman (see #23506).