Add missing UCUM units

[keilw]

At the moment at least

SECTIONS §41-§43 skipped; implement later if needed

are missing from the UCUM system.

[garretwilson]

@keilw , I want to introduce you to a GlobalMentor developer @magnonasc. I'm going over the UCUM tasks right now. If you want you can assign this issue to him.

[keilw]

@garretwilson @magnonasc Thanks y lot for helping out with this.

[magnonasc]

Although there are a lot of UCUM units that are missing, there are a lot of types that still doesn't exist in the api, such as the units for fluid resistance, or refraction of a lens , or slope, so I'll add what I can, but I'll leave the ones that we don't have a type for when they're created in the api... It might be an issue for unit-api aswell. Nevermind, you have dimensionless that might be enough.