* - Added support for stacking items within individual subgroups while subgroupStack is on

* - Adjusted location of visibility check to cover subgroup stacking

* - Fixing linting issues

* - Updated subgroup stacking to optionally take a 'subgroupStack' parameter of "true", which enables stacking in all subgroups
- Fixed code to meet style guidelines
- Updated documentation

* 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.

* Tightens up jsdoc lint rules on timeline

* Adds missing options param

* Fix redraw order

* Fix error when option is not defined

* Allow template labels

* Fix boolean types bug

* Add subgroup stacking

* Almost finish subgroup stacking

* Play with examples for subgroup order

* Fix stacked subgroups

* Fix subgroup stacking

* Add stackSubgroups option

* Fix example

* Add docs

* Fix onRemove item subgroups recalculate

* Return subgroup example and add stackSubgroup example

* Split stackSubgroup example to subgroup/html and expectedVsActualTimesItems.html

* Fix small bug when subgroups start overlap

* Fix redraw order
* Fix error when option is not defined
* Allow template labels
* Fix boolean types bug
* Add subgroup stacking
* Almost finish subgroup stacking
* Play with examples for subgroup order
* Fix stacked subgroups
* Fix subgroup stacking
* Add stackSubgroups option
* Fix example
* Add docs
* Fix onRemove item subgroups recalculate
* Return subgroup example and add stackSubgroup example
* Split stackSubgroup example to subgroup/html and expectedVsActualTimesItems.html