* Fixing a bug with the call to `repositionX`. The `items` collection is an object, not an array, so it cannot be iterated over using a normal for loop. Not repositioning the items causes the vertical stacking to jump around sporatically while scrolling.

* Update Group.js

* - 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

* Make items redraws return queues

* Parallel initial items redraw

* Seperate read and write actions in items

* Parallel all items redraws

* Remove comments

* Fix linting comments

* Fix redraws on actions

* Add stress example

* Fix example files

* Explain and fix example

* Fix comment issues

* Implement group redraw @grimalschi performance enhancement

* Fix JSDoc for redraw

* Remove commented out in itemset

* Remove fasdom

* Clean up queue functions in group redraw

* Fix mistake in comments

* Remove extra read-write from _didResize

* Resolve review comments

* Fix ranged item resizing bug

* remove parameter that wasn;t used

* Implement group redraw @grimalschi performance enhancement

* Fix JSDoc for redraw

* Remove commented out in itemset

* Remove fasdom

* Clean up queue functions in group redraw

* Fix mistake in comments

* Remove extra read-write from _didResize

* Resolve review comments

* 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.

* Removes redundant .eslintrc from graph3d, lints the rest of the code base, and enables valid-jsdoc lint rule

* Corrects lint violations

* Tightens up jsdoc lint rules on timeline

* Adds missing options param

Only draw non-visible items once when they are loaded, instead of continuously every frame

* Fix redraw order

* Fix error when option is not defined

* Allow template labels

* Add .travis.yml file

* Add experiment travis code

* Fix react example

* created a checklist for the release process

* unchecked everything

* added make github release

* Fix colliding subgroups when having same end-start times

* Remove npm-debug logs

* Add support for multiple class names in utils add/remove class methods.
Reset subgroup heights in resetSubgroups method.

* Adjust to better process class names

* Fix redraw order

* Fix error when option is not defined

* Allow template labels

* Add .travis.yml file

* Add experiment travis code

* Fix react example

* Improve redraw performance by not restacking non-visible groups (related to #2835)

* only restack necessary groups on redraw (related to #2835)

* Add methods to remove and add items to a subgroup.
Add method to change the subgroup an item is in.
No longer decrement subgroup ID when removing a subgroup.
Fixes #2594

* Moved the orderSubgroups call outside of the add/remove methods.
Added the ability to call the add/remove methods without a subgroupId parameter (takes from item data instead).

Don't update the showNested property if nothing has been set in the data object, unless it is undefined.
Verify group object exists during `onGroupClick`

* 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 groupEditable
* Fix group drag in vertical direction bug
* Fix indentation
* Add initial nestedGroups property
* Fix redraw order
* Get nested groups hiding working
* Add order to nestedGroups
* Fix up example
* Add support for intially closed nested groups
* Add nested groups indentation
* Fix indents
* Add nested groups docs
* Fix example
* Revert indents
* Add classes to nested and nesting group labels and add nesting group css
* Use pure css for nested group icons
* Remove commented off lines and unnecessary btn
* Fix indents
* Add support to showNested:false in group
* Add semicolon
* Remove empty lines

* Add hidden groups height calculations
* Fix jittering groups
* Remove non-existant parameter
* Cleanup example
* Remove console.log

* Hide vertically hidden ranged items in groups that are not visible
* Add element to templates options
* Fix comment typo
* Add documentation for react mounting
* add react example
* Fix typo
* fix title
* Fix review comments

* Hide vertically hidden ranged items in groups that are not visible
* Fix misspelling
* Fix examples that do not contain groups
* Add example for vertical hidden ranged items
* Fix indent format in RangeItem
* Fix example
* Fix other examples after addition of vertical hiding range items in groups
* Add case of zero margin axis
* Fix commented out lines in examples
* Fix vertical visibility bug

* Hide vertically hidden ranged items in groups that are not visible
* Add element to templates options
* Fix comment typo
* Add documentation for react mounting

* Hide vertically hidden ranged items in groups that are not visible
* Add custom function format for time labels
* fix misspell
* remove spaces
* remove backspace
* add backspaces
* Add docs and examples
* Fix docs

* Hide vertically hidden ranged items in groups that are not visible
* Add rtl to timeline options docs
* Fix misspelling
* Update RangeItem.js

* Hide vertically hidden ranged items in groups that are not visible
* Fix misspelling
* Fix examples that do not contain groups
* Add example for vertical hidden ranged items
* Fix indent format in RangeItem
* Fix example
* Fix other examples after addition of vertical hiding range items in groups
* Add case of zero margin axis