$ PYTHONPATH=$PWD:/usr/lib/python2.7/dist-packages pypy -m diffoscope.main --debug tests/data/test?.iso
$ PYTHONPATH=$PWD:/usr/lib/python2.7/dist-packages pypy -m diffoscope.main --debug tests/data/test?.deb
$ PYTHONPATH=$PWD:/usr/lib/python2.7/dist-packages pypy -m diffoscope.main --debug tests/data/test?.tar
$ PYTHONPATH=$PWD:/usr/lib/python2.7/dist-packages pypy -m diffoscope.main --debug tests/data/test?.xz
$ PYTHONPATH=$PWD:/usr/lib/python2.7/dist-packages pypy -m diffoscope.main --debug tests/data/test?.png

This reverts commit a0cbfa86.

This should work in theory and does in practise *except* for the case of
readelf where it works on small cases but fails for large cases and sometimes
makes those cases worse, see the bug report for details.

Add a --exclude-command CLI for filtering out long-running commands like "readelf --debug-dump=info"

- also rm an unused define

Add logic to force-compare 1-element containers with each other, and remove
several unnecessary get[_adjusted]_member overrides in subclasses.

This will make it easier to improve the progressbar logic

Also useful for doing "shallow" diffs of very large projects like GCC

Python already calculates the default like that, no need to clutter the code visually

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

Signed-off-by: Mattia Rizzolo <mattia@debian.org>