Merge from beta branch.

Merge from beta branch.

* elmo-cache.el, elmo-database.el, elmo-date.el,
elmo-dop.el, elmo-filter.el, elmo-imap4.el, elmo-internal.el,
elmo-localdir.el, elmo-localnews.el, elmo-maildir.el, elmo-msgdb.el,
elmo-multi.el, elmo-nntp.el, elmo-pipe.el, elmo-pop3.el,
elmo-util.el, elmo-vars.el, elmo2.el, mmelmo-1.el, mmelmo-2.el,
mmelmo-imap4-1.el, mmelmo-imap4-2.el, mmelmo-imap4.el, mmelmo.el
(toplevel): Deleted time-stamp line.