Add Binary Load XIO 39 and 40.

CIO commands 39 and 40 need to be added. These load (and run by default) a binary file, and are required because MyDOS and SpartaDOS do not put a binary load routine in their disk utility packages.

* 39 is used by MyDOS
* 40 is used by SpartaDOS

The fundamental difference is that MyDOS opens the channel and reads the first two bytes, before handing off to XIO 39, while XIO 40 does not require an open channel.

The binary loader needs to be inside the handler itself, and there are plenty of examples, e.g.:
https://gist.github.com/tschak909/a10f8927e060dcf838b0b69c40440c0e