{
  "renderer" : "TestRenderer",
  "assembler": [ "Markdown", 
                { "html_wrapper": "wrapper.html", "text_wrapper": "wrapper.txt" }
               ],
  "path"  : "body.mkdn",
  "header": [
    { "Subject": "this is a markdown test" },
    { "From":    "\"Ricardo Signes\" <rjbs@example.com>" }
  ]
}