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   Compute maneuver profile for a circular maneuver.
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   Form:
   [fR, iT, fuel] = CircularManeuver( p, r, m, t, uE )
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   Inputs
   ------
   p            (1,1)     Period (min)
   r            (1,1)     Radius of maneuver (m)
   m            (1,1)     Mass (kg)
   t            (1,1)     Duration (min)
   uE           (1,1)     Exhaust velocity (m/sec)

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   Outputs
   -------
   fR           (1,1)     Required radial force (N)
   iT           (1,1)     Required tangential impulse (N)
   fuel         (1,1)     Fuel consumption (kg)

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