And made them shorter in name. The new ascii.h file allow reuse in userspace
code.

It was a bad idea and having sms/pad interact directly with sms/vdp
is much simpler.

ref #64

It allows to see much more easily where the action happens on the screen.

That is, send current chr selection, and then, send LF.

This avoids having "ghost" chr selection sticking around.

This allows for outputting a character selection before it's given
through GetC. That allows a pad-oriented character selection scheme.

Still a bit rough around the edges, but still, works rather well.