Add scripts for 4.3.1-2 tweak release

This tweak release has been made to fix the self tests 'RSNAQuantTutorial'
and 'RSNAVisTutorial' in the package that will be used in the tutorial
session hold during RSNA 2013.
See http://wiki.na-mic.org/Wiki/index.php/RSNA2013_Planning

The problems related to these two self tests are described in the
following mantis issues:
 http://www.na-mic.org/Bug/view.php?id=3506
 http://www.na-mic.org/Bug/view.php?id=3507

As explained in previous commit 9ced56b13e, to make the deployment of
the package on the RSNA workstation easier, this tweak release bundles
the ChangeTrackerPy extension (rev 2d7f8ee3).