Fixes #518

[i3arnon]

This change is

[mexx]

@i3arnon Thank you for your contribution.

Please update the readme.md, I think it's worth adding a new section like the Fluent Date one.

[mexx]

fixes #518
GitHub doesn't link the PR and the issue when it's in title, it has to be in comment.

[hazzik]

I think we need to mark these methods with [MethodImpl(MethodImplOptions.AggressiveInlining)]

[hazzik]

Also, I concern about "billions". In a "real world" there are "long scale" and "short scale". We need to describe explicitly in XML comments what scale do we use (it's short)

[clairernovotny]

Pinging @mexx @hazzik? Should this be merged?

[aloisdg]

Any update on this? @i3arnon @mexx @hazzik

[mexx]

LGTM

[clairernovotny]

Rebased and merged in, thanks!