pub fn min_shift(byte: u8) -> u8 {
    let mut min = byte;
    for i in 1..8 {
        min = cmp::min(min, byte.rotate_right(i));
    }
    min
}
Returns the least value of all rotations of a byte.

# Examples
```
use imageproc::local_binary_patterns::min_shift;

let byte = 0b10110100;
assert_eq!(min_shift(byte), 0b00101101);
```
src/local_binary_patterns.rs