Add URL header and autoload

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Merge remote-tracking branch 'refs/remotes/ruediger/master'

Signed-off-by: Moritz Ulrich <ulrich.moritz@googlemail.com>

Conflicts:
	weechat.el
Merge branch 'master' into better-notifications

Signed-off-by: Moritz Ulrich <ulrich.moritz@googlemail.com>
supply date and buffer-name to notification handler

Signed-off-by: Moritz Ulrich <ulrich.moritz@googlemail.com>