title: how to animate the move of a point from a position to another in a HighCharts scatterplot
body: <p>In a HighCharts scatterplot I want to move a point from its position to another one using a smooth animation.
  For example, in the scatteplot defined in the following code (<a href="http://jsfiddle.net/kd8A9/" rel="nofollow">jfiddle</a> link):</p>
  
  <pre><code>$(function () {
      var chart;
      $(document).ready(function() {
          chart = new Highcharts.Chart({
              chart: {
                  renderTo: 'container'
              },
              xAxis: {
                  min: -0.5,
                  max: 5.5
              },
              yAxis: {
                  min: 0
              },
              title: {
                  text: 'Scatter plot with regression line'
              },
              series: [{
                  type: 'scatter',
                  name: 'Observations',
                  data: [[1, 1.5], [2.8, 3.5], [3.9, 4.2]],
                  marker: {
                      radius: 4
                  }
              }]
          });
      });
  
  });
  </code></pre>
  
  <p>I want to move the first point from (1,1.5) to (2,2). Is it possible?</p>