title: Bring Hudson slave nodes online at certain times
body: <p>I am setting up a number of slaves to my Hudson master, grouped by labels. I would like to be able to have a set of nodes that run during the day and an additional set of nodes that are turned on during the evening. </p>
  
  <p>Is this possible, either directly by hudson or via plugin or script? If so what is your recommended solution?</p>