title: Gulp watch multiple folders
body: <p>In a project, during development, I want to </p>
  
  <ul>
  <li>Watch and recompile server side code with Babel (since I want to use "ES6" on Parse)</li>
  <li>Watch and recompile client side code with Browserify/Watchify</li>
  </ul>
  
  <p>How can I do this? I could write 2 watch tasks, but I will have to open 2 terminal windows just to watch both these directories. Isit possible to do it in 1 gulp task? Like do 2 tasks? </p>