Fixed #3276 with HTML markup in element titles when a label is shortened by ellipsis.
Allow changing `Date` class used to support other calendars
Added true color animation for Highmaps and heat maps, so fills and strokes are animatable through SVGElement.animate. Closes #3311.
Merge pull request #3313 from tahajahangir/changeable-date-class

Allow changing `Date` class used to support other calendars
Added comment
Fixed #3182, three level drilldown broken when drilling up and down again on the same series.
Merge remote-tracking branch 'upstream/master'