Support unit conversion option in witsml log data fetching

[llliuwg]

For example, we might want to convert all "m" to "ft", and all "rad" to "dega".

[cherrera2001]

We are reviewing exactly how we are going to approach this. Ideally we would reuse something that is already out there, we are just vetting the possibilities. But I agree with the Ask so we will review it.