Collector #376.

As a result of this checkin:

 - a new permission 'Copy or Move' will be registered for all classes
   that inherit from OFS.CopySupport.CopySource.  This includes
   almost all Zope objects, as SimpleItem inherits from CopySource.

 - the new permission will be granted to the Anonymous and Manager
   roles by default.

 - Site managers may choose to disallow copying of objects by
   revoking the Copy or Move permission respective to a role in
   a place or globally.

Notes:

The methods cb_isCopyable and cb_isMoveable are coopted for this
duty, although access control was never in their job description
prior to this patch.