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This is just a collection of bits and pieces and cannot be run usefully yet.

this commit finishes the first version of winplot.sh

evaluate all parameters given on command line and in parameter file and set
stuplox options accordingly.

Usage information as well as some additional command line parameters shall be
supported. This commit adds basic code blocks for this purpose.

Implement all parameters which can already be supported by stuplox.

Missing:
 - removal of average
 - limitation to positive data values
 - sample range selection

Add shell script winplot which shall be a Linux replacement for the BASIC
program winplot.g32