Updated demos
Fixed #2700 causing data labels to not render inside columns if the actual value of the column was cropped.
Fixed issue with horizontal axis labels being clipped instead of justified into chart area. Closes #2703.
Added option, yAxis.reversedStacks, to choose whether to stack from the top down or from the bottom of the stack and up.
Added smarter logic to setData, where instead of re-creating all the data points, existing points are updated. This allows animation, performs faster and is less prone to memory issues.
Performance improvements
Experimenting with rendering on canvas
Fixed #2713 where series connected to a dynamically added X axis would fail.
Maps: Added geojson demo. Support array for joinBy.
Made chart.style option take effect on chart instances, not only globally. Closes #2723.
Fixed #2722 where pie slice data label connectors would have the wrong Z index after hiding and showing the slice.
Merge branch 'master' into dev-irregular-data
Reworked reading of series. Now with possibility to read from any column index.