Invalid options that were deprecated and removed from tmux

[darcyparker]

status-attr, window-status-fg, window-status-bg, window-status-current-fg, window-status-current-bg, pane-border-fg, pane-active-border-fg, message-bg and message-fg have been removed from tmux.

See tmux/tmux@f34ebfe

[viing937]

Thanks for your PR, I updated my tmux conf.

[appleby]

I think this was fixed by the recently-merged #23 and can now be closed.