colorterm added to contrib



Back in September, I gave an example of a function to give colored text 
input and output in terminal mode. I have now added that file, 
colorterm.lisp, to the contrib directory. The file now includes the 
following notes:

;;;; Notes:
;;;; To use this file in interactive mode, do
;;;;   load("colorterm.lisp");colorterm();
;;;; To use this file every time you launch maxima, add the above line
;;;; to maxima-init.mac in $HOME/.maxima

;;;; Known bug: colorterm interacts poorly with rlwrap. When rlwrap is
;;;; being used to run maxima (e.g., with rmaxima) extra characters appear
;;;; after the prompt. These characters are confusing, but do not appear as
;;;; part of the actual input.

--Jim Amundson