pyp2rpm should add R: python-setuptools if package uses setuptools entrypoints

[Slavek Kabrda]

If package uses setuptools entrypoints [1], the generated scripts import "pkg_resources", which is part of setuptools. Therefore packages that contain at least one entrypoint should have "Requires: python-setuptools".

[1] https://pythonhosted.org/setuptools/setuptools.html#automatic-script-creation

[Robert Kuska]

Sounds reasonable.

[Robert Kuska]

Auto add requires for setuptools if setup.py contains entry_points, fixes #16

→ <<cset 62e8bca51e5a>>