user-friendly improvements to the cmuscheme library

[Emilio Lopes]

The attached patch to "cmuscheme.el" makes editing of Scheme files, as
I see, more user friendly.

The first change introduces an user option to control whether the Scheme
process buffer should be automatically displayed upon evaluation of
Scheme code by the user, thus making the results of the evaluation
visible.  The default value of this option is `nil', so that the current
behavior is preserved.

The second set of changes offers the user to start a Scheme interpreter if
she tries to evaluates Scheme code without having started an interpreter
before.  Right now Emacs just raises an error in this case.

2005-01-06  Emilio C. Lopes  <address@hidden>

        * cmuscheme.el (scheme-display-buffer-on-eval): new user option.
        (scheme-send-region): display process buffer, if desired.
        (scheme-display-process-buffer): new function.
        (switch-to-scheme): start new scheme process, if none found.
        (scheme-proc): dito.
        (scheme-get-process): new function.
        (scheme-interactively-start-process): new function.

cmuscheme.diff
Description: diffs to cmuscheme