Update install

- Add ability to run install without any prompts using `fzf_quiet_install` env var.
- Update sed regex to strip `*` from history lines when using `tmux` and `fc`
e.g. when using tmux and fc in different windows can cause output such as:

  > 632* vim ~/.tmux.conf
  > 633 tmux -2 a
  > 635* git diff
  > 636* git commit -a