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   Simulate a dual-spin-turn.
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   Form:
   [w, wMWA, q, t] = DST( w, nSim, database, dT )
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   ------
   Inputs
   ------
   w              (3,1)   Body rate at start (rad/sec)
   nSim           (1,1)   Number of steps
   database       (1,:)   Database
   dT             (1,1)   Time step

   -------
   Outputs
   -------
   w              (3,1)   Body rate at finish
   wMWA           (3,1)   Momentum wheel speed
   q              (4,:)   Quaternion
   t              (1,:)   Time

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