UDPRIM template -
       purpose:
           serve as a template for creation of new UDPs
           as an example, it creates a sphere centered at the origin
       input Bodys:
           -none-
       input arguments (specified as name/value pairs):
           radius      radius of sphere                        [default 1]
       output arguments:
           -none-
       usage notes:
           the radius must be positive

           analytic sensitivities are not supported
       contributed by:
           John Dannenhoffer john@geocentrictech.com
