zsh: make vcs info in prompt async Roughly cribbed from [0], but I'm hoping to rework this soon to use the zsh async library that shouldn't require a tempfile. 0: http://www.anishathalye.com/2015/02/07/an-asynchronous-shell-prompt/

fpath=(~/.zfun $fpath)
autoload -U ~/.zfun/*(:t)

function af_reloadfuncs()
{
  local f
  f=(~/.zfun/*(.))
  for comp in $f ; do
    unfunction $f:t 2> /dev/null
    autoload -U $f:t
  done
}