Fix compile warnings.

* weechat.el: `cl-remove-if' instead of `remove-if'
* weechat-button.el: Unused lexical variable

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Completions: When loaded call setup in existing WeeChat buffers.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Merge branch 'ruediger-master'

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

Conflicts:
	weechat.el