ttn elisp tutorial lesson 03 added

[thi <ttn@mingle.glug.org>]

lesson 03 covers vars, `setq' and `let'/`let*'.  the table of contents
is now more detailed, too.  please see

	http://www.glug.org/people/ttn/software/elisp-tutorial/

for more information.  feedback greatly appreciated (especially from
people who already know elisp :-).

yours truly,
thi