`'fc' -l 1` generated an error message on bash

Feed all zsh history into fzf

e.g.
  Match region #1: [-----------]
  Match region #2:       [---]
  Match region #3:         [------]

- Make -0 and -1 work without -q
- Change exit status to 0 when exiting with -0

Avoid error message in an empty directory

Fix #34: tmux integration on Linux