title: How to show only integer values on yAxis of HighChart?
body: <p>We have a set of a data that contains counts of instances of events. These can only be integers. When we display data that has a high enough yValue the yAxis labels are integers. However, when we zoom in to ranges of data that have under y = 5 we see the tick markers show things like 0.5, 0.75, 1.5, etc. How can we force the yAxis labels to only show integer values?</p>
  
  <p><a href="http://jsfiddle.net/wergeld/uDg9k/" rel="noreferrer">Here</a> is an example bit of code with some data. As you zoom in to the lower value region of the chart you can see what I mean.
  This is the current yAxis setup:</p>
  
  <pre><code>yAxis: {
    labels: {
      style: {
        fontSize: '9px',
        width: '175px'
      }
    },
    title: {
      text: ''
    }
  },
  </code></pre>