AtmGamma:

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   Computes the ratio of specific heats.
   The ratio is a function of temperature of the atmosphere.

   Type AtmGamma for demo.
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   Form:
   gammaOut = AtmGamma( T )
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   ------
   Inputs
   ------
   T                  Temperature (deg-K)

   -------
   Outputs
   -------
   gammaOut           Ratio of specific heats

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	References:	  Hill, P.G., C. R. Peterson, Mechanics and Thermodynamics
                 of Propulsion, Addison-Wesley, Reading, MA, 1970, p. 541.
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Children:

Common: Graphics/Plot2D