getItem
Get details for a given item

Input
object
  itemID*:      integer
  The ID of the item to retrieve


Output
object
  id:           integer
  title:        string
  deleted:      boolean
  by:           string
  time:         string
  text:         string
  dead:         boolean
  parent:       integer
  kids:         array[integer]
  url:          string
  score:        integer
  parts:        array[integer]
  descendants:  array[integer]