add maintainer scripts if .py files are installed directly into /usr/share/pyshared

  - use Depends: python (<< 2.X), python (>= 2.Y) rather than Breaks
    in packages with public modules (after a discussion on debian-devel
    mailing list)

checked correctly)

dh_python2: replace a file with a symlink also if there's a matching one in pyshared directory already

  - test3 added (to test architecture dependent packages)

if there are no other public modules available

as public modules for all requested Python versions (use dh_install's
package.install files for private modules)

(and more verbose in --verbose mode)

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

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

doesn't contain dependency that package needs)

(Breaks will be used if available)

* ignore dh's -O option
* allow multiple -p options
* add -N option