[kbd] diagnostic and demo tool ushowkey

[Alexey Gladkov]

Josef Hinteregger wrote:
> I would like to contribute a tool I have written. For the moment I
> have called it ushowkey, kind of showkey with display of Unicode
> information for the characters entered. It is not restricted to the
> console. Here is a sample output from a putty session
> 
> Press key(s) to display diagnostic info check if key codes are in
> sync with locale encoding and if function keys are recognized by
> ncurses/terminfo Leave with q, Ctrl-D, ESC, Return

I really do not like the idea of adding dependence on ncurses/terminfo 
to kbd package only for this utility.

I can put this utility into contrib directory.

-- 
Rgrds, legion