Header line support.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Merge branch 'master' of git://github.com/the-kenny/weechat.el
Added support for _buffer_title_changed messages.

Even updates header line.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Handle colors in message text.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>