* Fixes issue 3321 by ensuring labels are drawn as part of initial construction of the DataAxis

* Simplify test and remove support for node 6

* Exclude test coverage from regular test runs

* Tightens up jsdoc lint rules on timeline

* Adds missing options param

It was broken by PR (#1729), which fixed issues #112 & #1730.
As far as I can tell that change shouldn't influence the DataAxis (vertical-axis), but only the horizontal axis.

 @yotamberk can you check if your examples still work as expected?

Internet Explorer does not support the ES6 Number.parseFloat (see http://caniuse.com/#feat=es6-number). Instead, substitute the regular parseFloat method.

Cleanup of linegraph's event handling
Fixed #1557: Make sure we don't default to scientific notation.
Couple of minor fixes in group counts and ranges.

-Keep single defaults location
-Update documentation on formatting function.

Fixes DOM API deprecation warning in Chrome.
Please see: https://www.chromestatus.com/features/5724912467574784

This is an improved version of PR #1501.

-Draw points in bar icon if appropriate
-Introduce point icon
-Cleanups

format for graph2d is now a function.

This is primarily designed for the graph2d line graph.