* module/scripts/help.scm (show-help, show-summary, show-usage): Grovel
for %synopsis and %help variables as well, and show them
appropriately. Export these routines for other script modules to
use. Needs documentation.
* meta/guild.in (display-version): Display the version, not the
effective version.
* module/scripts/help.scm (list-commands)[help]: Add proper footer, as
per the GCS.
* meta/guild.in (display-version): Use (ice-9 command-line)'s
version-etc.
(main): Dispatch --help to guild help.
* module/scripts/help.scm: New file, a copy of list.scm, but with a
better name.
* module/Makefile.am: Add help.scm to the list.
* module/scripts/list.scm: Change to be an alias to "help".
(list-scripts): Restore this API.
