BuildConstant:

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   Build the constant database. You can add to this function to build
   your own constant databases. It saves the database as sCTConstants

   save sCTConstants constName constNameNoSpace value units
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   Form:
   BuildConstant( name )
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   ------
   Inputs
   ------
   name            (1,:)  Name of the database

   -------
   Outputs
   -------
   None

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