Switch buffer in WeeChat using fzf.
Currently requires WeeChat to be run inside tmux, as fzf is opened in a separate tmux pane.
Requires fzf to be installed.
Copy the fzf.py script into ~/.weechat/python.
Load the script in WeeChat: /script load fzf.py.
Run /fzf in WeeChat.
Optionally bind a key to it, e.g.: /key bind ctrl-G /fzf.