Add MemcachedTool.

This tools offers a dictionnary interface to memcached.
As it depends on python-memcached and should not fail silently if the site administrator does not have this python module, this tool is disabled by default.
You can enable it runing "touch Products/ERP5Type/USE_MEMCACHED_TOOL"


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@11618 20353a03-c40f-0410-a6d1-a30d3c3de9de