* debian/control: computer-janitor-gtk depends gir1.2-pango-1.0 not * application.py, test_application.py: Fix apt_cache deprecation warnings. * debian/rules: - Switch to dh_python2. - Run the unit tests at build time. - Add --keep to dh_installchangelogs. - Remove override_dh_pysupport. * debian/control: - Add Build-Depends on python-dbus and update-manager-core so that the unit tests can be run at build time. Remove B-D on python-support. - Fix typo in descriptions. - Remove XB-Python-Version and add X-Python-Version for dh_python2.