0.17.4

• Added --layout option with a new layout called reverse-list.
  • --layout=reverse is a synonym for --reverse
  • --layout=default is a synonym for --no-reverse
• Preview window will be updated even when there is no match for the query
  if any of the placeholder expressions (e.g. {q}, {+}) evaluates to
  a non-empty string.
• More keys for binding: shift-{up,down}, alt-{up,down,left,right}
• fzf can now start even when /dev/tty is not available by making an
  educated guess.
• Updated the default command for Windows.
• Fixes and improvements on bash/zsh completion
• install and uninstall scripts now supports generating files under
  XDG_CONFIG_HOME on --xdg flag.

See https://github.com/junegunn/fzf/milestone/12?closed=1 for the full list of
changes.