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   Simulate the fast reorientation system and demonstrate quaternion propagation
   The routines are: QProp, QIToBDot, and the JPL propagation from the Wong 
   reference.
   See also FRSTarg, FRSMPlan, FRSCGen
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   References: Wong, E.C. and W.G. Breckenridge, "Inertial Attitude Determination
               for a Dual-Spin Planetary Spacecraft", AIAA Journal of Guidance
               Navigation, and Control Vol. 6, No. 6, Nov-Dec 1983, pp. 491-8.

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