the command.list files is installed in the wrong location (/usr/Owlcat/bin/commands.list in case of package.
python-owlcat: /usr/Owlcat/bin
python-owlcat: /usr/lib/python2.7/dist-packages/Owlcat/__init__.py
python-owlcat: /usr/lib/python2.7/dist-packages/Owlcat/FunkOps.py
python-owlcat: /usr/Owlcat/bin/commands.list
python-owlcat: /usr/lib/python2.7/dist-packages/Owlcat/FitsTool.py
python-owlcat: /usr/lib/python2.7/dist-packages/Owlcat/Tables.py
python-owlcat: /usr/Owlcat