Changing the tooltip dot from a path to a circle helps resolve #485 (#505)
Changing the tooltip dot from a path to a circle helps resolve #485 (#505)

* Fixed chrome install in travis (#495)

* Changing the tooltip dot from a path to a circle so it's radius can be altered via CSS rules

* Silly copy/paste mistake using the incorrect y axis. Should be y0 rather than y1

n3-charts/line-chart,n3-charts/line-chart,n3-charts/line-chart,n3-charts/line-chart