Real gas calculations

[Dirk Hohndel]

> On Jan 12, 2017, at 12:30 PM, Robert Helling <helling at atdotde.de> wrote:
> 
> I just wanted to report that I am now convinced by Linus’ calculations of the real gas corrections (and also how a 4% correction at 200bar) can lead to an 8% correction to the SAC when the gas use is 200bar -> 100bar.
> 
> So I incorporated this corruption also in the planner (pull request is on github). But I am not sure that this should go into the upcoming release, since my testing due to time constraints was rather limited.
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Dr. Freud is calling....