title: Plot multiple lines on x-axis Highcharts
body: <p>I am required to draw a chart showing changes on number of users (Increase or decrease) on behalf of changes employee made on campaigns, for this i am maintaining change log of employee activity. so i need to plot x-axis lines on every x-axis series.</p>
  
  <p>I searched and yet not found any appropriate answer. this <a href="http://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/xaxis/plotlines-events/" rel="nofollow noreferrer">Js Fiddle</a>  has only one line plotted on x-axis, but i need lines on every x-axis series.</p>
  
  <p>one possible outcome could be, but will need to generate plotlines object for every line i need.</p>
  
  <pre><code>plotLines: [{
          color: '#FF0000',
          width: 2,
          value: 4.5
      }, {
          color: '#00FF00',
          width: 2,
          value: 5.5
      }]
  </code></pre>