(two more `set -e`s added, closes: 397499)

  - print error message if file cannot be opened (closes:
    521508, thanks to Carl Chenet for the original patch)
  - print nice error message if computed set of supported versions is empty
    (closes: 583392)

(Breaks will be used if available)

    supported versions and to make it the default version

modified:
  debian/changelog
  debian/pyversions.py

  * Merge changes back from Ubuntu package:
    - Tighten  depends relationships to '='
    - python: Add an unversioned 2to3' binary (Change pending in Debian)
    - python-minimal: Provide symlink to binary and manpage for
      /usr/bin/python2 (Closes: #566266)

modified:
  debian/changelog
  debian/control
  debian/rules

debpython module as logging module is not available in pythonX.Y-minimal
package (Closes: 586743)

modified:
  debian/changelog
  debian/python-policy.sgml

      XS-Python-Version
modified:
  debian/changelog
  debian/python-policy.sgml

(hardcoding list of versions is evil anyway)

* bump minimum required debhelper version to 6.0.7 (due to dh_lintian)

* Add some lintian overrides (for false positives)

* add "|| true" in postinst-pycompile

* add execute bit in rtupdate scripts

* rename dh sequence file to python2