gausssmooth and 2 color graph

[solid]

In previous examples of phyphox-files the version was not indicated and the experiment could be used only by Android smartphones, sorry.. Here is a corrected version of the pressure measurements using SensorTag of Texas Instruments with data smoothing by Gausssmooth and LOESS. Also the average of last 20 points of the raw pressure is given (the latter two additions were proposed by Sebastian). It works well for our students laboratory experiment of Clément and Desormes (determination of Cp/Cv of air).