partial backport of support for adbh's new interface to backup_command and restore_command
these methods can return lists or strings which are passed to subprocess.call
without or with the shell=True parameter respectively.
This directory contains extra libraries which are needed
to make cubicweb work.
The mx.DateTime python implementation is directly taken from
the mx.DateTime distribution. The only modification is the
strptime function which has been mocked using the standard
``datetime`` module. (as provided by the python2.5's stdlib)