* in --save mode, all test_* methods are skipped.
* in --load mode, use a DemoStorage based on a Data.fs made by --save mode.
* install bin/zopectl, bin/runzope and etc/zope.conf to the unit_test
  directory to make possible to run real zope server on it.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@12589 20353a03-c40f-0410-a6d1-a30d3c3de9de