Adapt copyright years.

* debbugs-gnu.el (debbugs-gnu-default-packages): Extend list of packages.
(debbugs-gnu-get-bugs): Support 'bugs query.
(debbugs-gnu-usertags): Simplify implementation.
(debbugs-gnu-bugs): New defun.
* debbugs-gnu.el : Require wid-edit.el.
New package lex.el.
* Makefile: Refresh changelogs before copying `packages'.
New command ack-yank-symbol-at-point and bind it to M-Y

Thanks to scottj@irc.freenode.net for request and testing.
Also update copyright years.
Avoid error message in emacs 24.4.
Restore eldoc-eval.el.
* sml-mode.el (inferior-sml-mode): Fix comint-completion-addsuffix.
* sml-mode.el (sml-mode-variables): Set sml-prog-proc-descriptor here...
(sml-mode): ... instead of here.
* sml-mode: Release 6.3, bugfixes
New package ggtags
Fix error during redisplay: (wrong-type-argument stringp nil)
Fix ggtags-global-exit-message-function
Do not abuse assert in what it is designed for

An `assert' should be used for something that should *never* be false.