import RE patch from build82.dcjp02, including rc scripts and a workaround

commit 6904a77e638801db93b3e785ba97005c201d5944
Author: Mitsuru Y <mitsuruy@reallyenglish.com>
Date:   Tue Oct 23 16:03:02 2012 +0900

    disable assertion in changes/manager.py for backward compatibility

    assertion was introduced at 0.8.6 and it may break backward compatibility
    as it fails in REs environment.
    This is a workaround and should be fixed later.