Default y-axis unit when "humidity ratio"

[AGeissler]

In the examples and base styles the unit for humidity ratio seems to imply "g/kg_dry air" ("da"). However, as far as I can tell, the corresponding necessary function from psycrolib "GetSpecificHumFromHumRatio" is not imported/used. This is confusing. The default/test/example axis labels should be corrected, IMO.

Best
Achim