check curl or wget is install and dowload with progress bar

http_dowload.sh

#!/bin/bash
# ============================
# Found in install.sh from dnote
# https://github.com/dnote/dnote/blob/master/install.sh
# ============================
http_download() {
  dest=$1
  srcURL=$2

  if is_command curl; then
    cmd='curl -L --progress-bar'
    destflag='-o'
  elif is_command wget; then
    cmd='wget -q --show-progress'
    destflag='-O'
  else
    print_error "unable to find wget or curl. please install and try again."
    exit 1
  fi

  $cmd $destflag "$dest" "$srcURL"
}