* ediff-init.el: comments.

* ediff-init.el: comments.

* ediff-hook.el: Got rid of autoloads. Not needed, since the hook
is loaded.

* ediff-mult.el (ediff-intersect-directories,
ediff-prepare-meta-buffer,ediff-get-directory-files-under-revision):
cleanup.
(ediff-draw-dir-diffs): now supports the "C" command in directory
difference buffer.
(ediff-dir-diff-copy-file): new function that implements copying
of files from one Ediff dir to another
(ediff-bury-dir-diffs-buffer): kills the buffer instead.
(ediff-append-custom-diff): better error msgs.

* ediff-util.el (ediff-compute-custom-diffs-maybe): buglet fix.
(ediff-inferior-compare-regions): Use
ediff-clone-buffer-for-region-comparison. Better and simpler interface.

* ediff.el (ediff-directories-internal): Cleanup.
(ediff-clone-buffer-for-region-comparison): Better interface.