Support SI:Hybrids

SI Hybrids carry the same data in different units like °C|K or W and dBm or V und dBV. The 2 units are related either over an

• Affine transformation like °C|K

Or not recommended but maybe possible in daly uasge by alboratys

• Affine transformation followed by Decadic logarithmen V dBV
• Affine transformation followed by natural logarithmen V dNpV (Np=Neper)
• Coordinate System transformations Cartesian<--> Polar for complex values

To deal with that following strategy will be used. The quantites will have an active unit which is used for the math operations, when performing the mathe operation the result will no longer be an hybrid. For repr() and str() both units will be shown but the non active just in "[]" values and uncers only shown in active unit. When Plotting with bokeh the transformation function will be estimated from the data and the units if possible. and this transformation is used the scale the axis witch should result in exactly overlapping data points.