rend 0.5.2

Cross-platform, endian-aware primitives for Rust
Documentation 
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```rust
use core::mem::transmute;
use rend::*;

let little_int = i32_le::from_native(0x12345678);
// Internal representation is little-endian
assert_eq!(
    [0x78, 0x56, 0x34, 0x12],
    unsafe { transmute::<_, [u8; 4]>(little_int) }
);

// Can also be made with `.into()`
let little_int: i32_le = 0x12345678.into();
// Still formats correctly
assert_eq!("305419896", format!("{}", little_int));
assert_eq!("0x12345678", format!("0x{:x}", little_int));

let big_int = i32_be::from_native(0x12345678);
// Internal representation is big-endian
assert_eq!(
    [0x12, 0x34, 0x56, 0x78],
    unsafe { transmute::<_, [u8; 4]>(big_int) }
);

// Can also be made with `.into()`
let big_int: i32_be = 0x12345678.into();
// Still formats correctly
assert_eq!("305419896", format!("{}", big_int));
assert_eq!("0x12345678", format!("0x{:x}", big_int));
```