Support Ord Trait for Primities when is avaliable

[latot]

Hi all! I think wold be very useful to have the Ord trait implemented when T of Point have it, f64 do not have Ord but other types have it.

My personal use case is some data must be sorted to perform for example integration while we have a vector of Points, instead of use f64 I has been using noisy_floats lib which allow use to have f64 without Inf/-Inf/NaN, so Ord can be achieved.

Thx!