[Core] Add Utility for Floating Point Comparison

[matekelemen]

Working with finite precision floating point numbers is ugly. Here's a utility to help with comparisons that's more robust than what we have right now.

see https://stackoverflow.com/a/32334103/12350793

FYI @aronnoordam

[loumalouomega]

I am OK with it

[aronnoordam]

can you add a test case which would fail when comparing 2 floats with a less robust method?

e.g. : 0.1+0.2 == 0.3

and the stackoverflow example

[matekelemen]

can you add a test case which would fail when comparing 2 floats with a less robust method?

e.g. : 0.1+0.2 == 0.3

and the stackoverflow example

done