string_py

This crate aims to make the String type as easy to use as the str type in python. This crate is for multibyte String type such as Japanese.

example

    let easy_string = EasyString::new("あいうえお");
    let slice_data = easy_string.slice(0, -1);
    assert_eq!("あいうえ",slice_data);
    assert_eq!(5,easy_string.len());