cmp_floats

This is a function I made, because other float comparison libraries seemed unnecessarily complicated.

Examples

```rust use std::cmp::Ordering::*; use cmpfloats::cmpfloats;

asserteq!(Less, cmpfloats(2.71828f32, 3.14159f64));

let a: f32 = 0.15 + 0.15 + 0.15; let b: f32 = 0.1 + 0.1 + 0.25; asserteq!(Equal, cmpfloats(a, b)); ```