title: xAxis startOnTick and endOnTick options ignored on boxplots
body: <p>It seems that the options <code>startOnTick</code>, and <code>endOnTick</code> have no effect on a boxplot. Is there anyway to align the outermost ticks to the graph edge with a boxplot?</p>
  
  <pre><code>xAxis: {
    startOnTick: true,
    endOnTick: true,
    min: -1,
    max: 6,
  },
  </code></pre>
  
  <p>I have tried adding most combinations of minPadding/maxPadding, tickmarkPlacement: between/on, and manually setting ticks with tickPositioner without any luck. The only workaround I have is to shrink min/max so the padding fixes itself. I would prefer a better solution, because this workaround becomes very ugly for dynamic data.</p>
  
  <p>Here is the <a href="http://jsfiddle.net/zK4JV/" rel="nofollow">fiddle demo</a> demonstrating the problem and <a href="http://jsfiddle.net/DX7P7/" rel="nofollow">another</a> with the workaround. Again, is there any way to align the outermost ticks to the graph edge with a boxplot?</p>