commander>Create Dynamic Range Layer
   macro>
      comment>Create a Dynamic Range Layer and add it at the top of the stack
      comment>Run autostretch_hsv leave mode Normal and at 100% opacity
      >>>original = theImage.layers[0]
      >>>DynRange = original.copy()
      >>>DynRange.name = "DynRange"
      >>>theImage.add_layer(DynRange, 0)
      >>>pdb.plug_in_autostretch_hsv(theImage, DynRange)
