[Bashdb-remake] A nicer GNU Emacs gdb interface

[R. B. <ro...@pa...>]

I was alerted to a nicer gdb interface that is available in Emacs 23
(and possibly Emacs 22). The Emacs Lisp routines are in file gdb-ui.el
and the name of the top-level Emacs command is "gdba" -- however if
everything is set right, running "gdb" will run "gdba".

I mention in case someone is interested in working on extending either
bashdb.el, pydb.el, or mdb.el to make use of the better UI. But beware
-- it looks like the underlying mechanism, a gdb "annotation level"
setting is going to be changed and phased out with something else.

Lament: there are about 6 different and incompatible GUI-to-debugger
interfaces.