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   Computes v and r given a, e and nu.
   Also gives the time for each step.
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   Form:
   [v, r, t] = AE2VR( a, e, nu, mu )
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   ------
   Inputs
   ------
   a           (1,1)    Semi major axis
   e           (1,1)    Eccentricity
   nu          (1,n)    True anomaly (rad)
   mu          (1,1)    Gravitational parameter (default = 3.98600436e5)

   -------
   Outputs
   -------
   v           (1,n)    Velocity
   r           (1,n)    Radius
   t           (1,n)    Time

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