dh_python2: pass shallow=False to cmpfiles to make sure only exactly the same files are moved to pyshared

    - Minimum changes for Squeeze

* Standards-Version bumped to 3.9.1 (no other changes required)

closes LP: #613675

(closes: 590224)

doesn't contain dependency that package needs)

dh_python2: follow Distribute and replace all non-alphanumeric characters with underscore in distribution name

    pycompile.

pyclean, pycompile: use .communicate() instead of .wait() to avoid hanging `dpkg -L PACKAGE` in few situations

    - python-minimal: Provide symlink to binary and manpage for
      /usr/bin/python2.
    This interpreter name is not created in the upstream sources.
    python should be used instead.

if debian/pyversions doesn't exist (as in -5, closes: 588820, thanks to
Vincent Legout)

- some packages moved from Conflicts to versioned Breaks
- Homepage field added

* bump PREVVER to 2.6.5+20100630-2~ and use -m compileall in debian/python-minimal.postinst

  (2.1 and 2.3 are no longer in Debian)
* revision 103 reverted (python dependency is needed for the docs symlink)

(duplicates Source's one)

(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)