Add OmniGraffle file with image source

I tried exporting to SVG but due to the imported icons I used,
  it is not a clean SVG but depends on external PDF files. Rather
  than dirtying up this image directory I'm adding this source
  in case someone can figure out how to properly exoprt to SVG.

Change-Id: I59ebd16e8dab86445d0a789e3a04f253babf64a3