QLVLH:

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   Generate the quaternions that transform from ECI to LVLH coordinates.
   For LVLH coordinates;
   z is in the -r direction
   y is in the - rxv direction
   x completes the set; along v in a circular orbit
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   Form:
   q = QLVLH( r, v )
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   ------
   Inputs
   ------
   r          (3,n) Position vectors
   v          (3,n) Velocity vectors

   -------
   Outputs
   -------
   q          (4,n) Quaternions

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Children:

Common: Coord/Mat2Q
Common: Graphics/Plot2D
Common: Math/Cross
Common: Math/Unit