DisplaySailProperties:

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   Display sail characteristics for a CAD model.
   Draws the model in 3D and displays properties at the command line.
   Axes are drawn on the 3D sail view with X blue, Y green, and Z red.
   If the normal is not entered it will be calculated for all sail
   components. This is the front normal of the sail, i.e. the side directed 
   towards the sun.

   See also ComputeSailNormal.

   Since version 7.
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   Form:
   DisplaySailProperties( g, normal )
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   Inputs
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   g       (:)       CAD model structure or a string file name
   normal  (3,1)     Normal vector (sail front) in body frame, optional

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   Outputs
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   None.

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