* Corrects usage of @static jsdoc annotation

* Correct unresolvable types

* Correct types in jsdoc and remove extraneous @class & @constructor jsdoc

* Remove incorrect @static jsdoc

* Adds missing jsdoc for param copyFromGlobals

* correct jsdoc in util

* Corrects casing on jsdocs

* Swaps @inheritDoc to @ignore for constructors where constructor args are documented in the class

* Instantiates Errors with `new`

* Addresses improperly defined @callback tags.

* Split callbacks out to separate jsdoc

* Moves constructor jsdocs back to constructor and drop @ignore.

* Adds missing @extends for constructors

* Adds names to constructors

* Tightens up jsdoc lint rules on timeline

* Adds missing options param

* Change lint rules

* Get eslint passing with require-jsdoc

* Added support to supply an X2 to bar charts to have them scale

* Fixed graph2d stacking issue.  It no longer takes into account hidden items

* Changed x2 to end per recommendation and added this to the docs

Some fixes and cleanups after the large rewrite.

Minor cleanup

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

Add some enhancements for stacking (especially with regard to shading)

-Never push into arrays that have a known length
-Move more functions back into the main updateGraph method

Fix no-group data input case.

Separate shading from line drawing (fixes drawing order)
Cleanup of draw code
Fix icon-shading CSS override

It was implemented in commit 4e6c5a5 and accidentally deleted in commit
f39c246.

+ Checking for callbacks
+ Using the newly generated 'groupTemplate' object instead of group
+ Updated calls to DOMutil.drawPoint to use the groupTemplate instead of group