Endian Trait Derivation

This provides a custom derive for the Endian trait on structs. It can operate on normal braced structs, tuple structs, and unit structs.

It currently only works on structs. Enums are not yet supported; I plan to look into this before a 1.0 release.

This crate is only useful as a sidekick to endian_trait.

extern crate endian_trait;
#[macro_use]
extern crate endian_trait_derive;

#[derive(Endian)]
struct Example<A: Endian> {
    a: A,
    //  others
}