derive_more 0.99.13

Adds #[derive(x)] macros for more traits
Documentation 
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#![allow(dead_code)]
#[macro_use]
extern crate derive_more;

#[derive(AddAssign)]
struct MyInts(i32, i32);

#[derive(AddAssign)]
struct Point2D {
    x: i32,
    y: i32,
}