Include units in las.df dataframe

[Coastal0]

Is your feature request related to a problem? Please describe.
Importing las dataframe logs with same pneumonics results in *.1 and *.2, e.g. NGAM.1 and NGAM.2, where 1 and 2 are in different units (e.g. API and CPS)

Describe the solution you'd like
Include option to add units to the dataframe header