New Import Export document

[Michael Freedman <Michael.Freedman@oracle.com>]

I have rewritten the original strawman to define specific import/export methods.
 It has been uploaded
to the Interfaces documents.  If you want to refer to the old version
click on "Manage" to the far right of the document entry.  This takes you
to a page where you can see the previous revision(s). 
     -Mike-