[BRLTTY] Let's improve documentation for the non blind

[Lee Maschmeyer]

Volker,

I tried going to your website but got a scary message about an invalid 
certificate. Since I don't know you from Adam I elected not to continue.

Would this be an acceptable alternative: At the very beginning of the README 
for this device add these lines:

To invoke the Help screen press ...
To invoke "learn" mode press ...
To invoke the Preferences menu press ...

You might also want to consult with your brother as this is an area 
requiring specialized experience.

HTH,

-- 

Lee Maschmeyer

"Never imagine yourself not to be otherwise than what it might appear to 
others that what you were or might have been was not otherwise than what you 
had been would have appeared to them to be otherwise."
--Lewis Carroll