title: Chart.js V2 line chart missing point
body: <p>Is there any way to get missing links connected in Chart.js 2.x.x like they linked in last versions of 1.x. </p>
  
  <p>If i had datasets in version 1.x with data [1,2,3,null,5,6] and [1,2,3,4,5,6], chart drew both lines without missing line on null point. On version 2.x linechart won't draw any line on set 1 between points 3 and 5.</p>
  
  <p>I have tried to read chart.js documentation but haven't found any options to this...</p>