Julia equivalent to Python's int.to_bytes

[louie4825]

@stevengj

Here is a more general replacement for Python’s to_bytes function, mainly as a learning exercise. The trick is to use bit shift ( >> ) and mask ( & ) operations:

By the way, @stevengj, is it okay to incorporate this into the code? I’m planning to release this as an open source package sometime, and I’d like your prior permission to avoid any issues down the line.