Bytes/String duality

[Thrameos]

In Python2 strings and bytes were confused concepts. A string could be either byte or unicode. With dropping of Python 2 support, we are now in a place where we no longer have to treat bytes as strings.

This may disrupt some existing code in which bytes are being passed with the expectation that they will convert to strings automatically. However, as JString already has a byte[] converter the only likely thing to break is passing arguments to methods.