GSOC New idea - Braille extension for XKB

[wettstein509 at solnet.ch]

There is some braille support in the compose mechanism in libX11, see
directory modules/im/ximcp.  I do not know whether and how it works,
though.

> 1. it is very simple, uses only six keys of the keyboard.

It appears the implementation in libX11 uses eight keys, each one
corresponds to one bit.  The input character is obtained by ORing the
bits of the pressed keys.  Maybe despite the name, it is something
different?

Andreas