Highcharts grid (#85)

* Added Highcharts Grid and added some new features

* Removed opensurce: false. Located at https://github.com/highcharts/highcharts/tree/master/ts/Grid

Author: stitot

data/highcharts-grid.yml

@@ -26,7 +26,6 @@ features:
   pagination: true
   resizableCols: true
   responsive: true
-  openSource: false
   serverSide: Pro feature
   sorting: true
   sparklines: Pro feature