Fix weechat-speedbar and deprecate some functions in weechat.el.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
Indent weechat.el

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>
weechat.el: Track unread-count for monitored buffers.

Signed-off-by: Moritz Ulrich <moritz@tarn-vedra.de>