* 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.
* module/scripts/: Add %summary entries, and in many cases,
%include-in-guild-list entries to inhibit a script from appearing in
"guild list". Update list.scm to respect this new variable.
* module/scripts/list.scm (strip-extensions): Don't list programs
without extensions.
(main): Be prettier. Parse out a %summary from modules, for a brief
synopsis.
...by not using its own-rolled getopt, and moving the `list' function
to a separate script
* meta/guile-tools.in: Use (ice-9 getopt-long).
(directory-files, strip-extensions, unique, find-submodules,
list-scripts): Deleted (and moved to new `list.scm' file).
(getopt): Deleted.
(main): Use getopt-long. Default to calling the `list' script if no
script is specified.
* module/scripts/list.scm: New script.
* module/Makefile.am (SCRIPTS_SOURCES): Add list.scm.
