New units: InternationalUnit, Scalar, HomeopathicDilution

[laci4321]

Hello my friends!

I recently found this amazing library. I intend to use it in an area which I think you did not meet before too often: in helathcare, and more specifically in pharmaceutical field. To be able to do that, a few important unit is missing from the library. Most of them are relatively easy to add, but I need some help in some cases.

1. InternationalUnit

The current implementation of the InternationalUnit brings some ambiguity, so I think it needs to be corrected. It currently used in the Common/UnitDefinitions/VitaminA.json as the base unit, however the InternationalUnit is used to describe the strength of multiple active substances. For e.g. VitaminD, bleomycin, pegaspargase, heparines, blood clotting factors, hormones, some enzymes etc. are also measured in IU, therefore IU should be an independent unit, not under only VitaminA. Changing this is a breaking change I think, so we need to discuss it earlier, before I touch anything. SI Prefixes are also necessary here.

2. Unit

Some other substances are measured simply in "Unit", which is not equivalent to the InternationalUnit. Like insulins, vaccines, biological therapies. SI Prefixes are also necessary here.

3. Scalar

Some other measurements like "genom copy count", "cell amount" or "antigen amount" can be used simply under the Scalar unit, but it also lacks the SI prefixes to be able to use them conveniently.

4. HomeopathicDilution

This one is tough, because it is logarithmic. 1D means 10x (1e1) dilution, 1C means 100 (1e2) dilution, but 1Q means 50,000x (5e4) dilution. I am not sure how to implement this. What is the exact meaning of the "LogarithmicScalingFactor"?

Please share your thoughts with me.

Thank you!