fixes #2784

Fix proposal for issue #2842

More details here : #2842

* styling support for graph3d tooltips

* styling support for graph3d tooltips

* graph3d styling example, deleted new example and altered the original

* graph3d tooltip styling, documentation

* graph3d tooltip styling, use the util module's method for merging objects

* Fix #2795 issue

* Fix redraw order

* Fix error when option is not defined

* Allow template labels

* Add .travis.yml file

* Add experiment travis code

* Fix react example

* Add animation options for zoomIn and zoomOut

* Fix redraw order

* Fix error when option is not defined

* Allow template labels

* Add .travis.yml file

* Add experiment travis code

* Fix react example

* Remove assign from examples

* Use jQuery

* Adjusted doc for autoscaling; ref Issue #2540

* Edited Defaults column for Min/Max options for completeness

This is to reduce breakage if the fallback / default changes in a future release.

* Fix background items when orientation top

* Add edited data as argument to the template function

* Update index.html

Resolves #2827.

* Fix for issue #2536

* Adjusted documentation for fix.

* Adjustments due to review

* Grrrrr whitespace

* Fixed Travis issue

fixes #2418

* Fix redraw order

* Fix error when option is not defined

* Allow template labels

* Add .travis.yml file

* Add experiment travis code

* Fix react example

* Fix events returned from mouse events

* Fix example

* Rename censor to stringifyObject in example

Resolves #2696

Resolves #2790

* 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

This addresses #1982 and #1417.

It possibly reduces performance, but correctness seems better.

Somewhat more complicated setup, associated with the need for a real window.

* Improve the performance of the network layout engine

Short-cut the execution of a number of methods in LayoutEngine to make them
handle highly-connected graphs better.

* Demonstrations of layouts of large networks

Clean up and centralise edit status for Timeline Items.

* Fix redraw order
* Fix error when option is not defined
* Allow template labels
* Add .travis.yml file
* Add experiment travis code
* Fix react example
* Add toggleRollingMode option
* Update docs with toggleRollingMode option

* Fix redraw order
* Fix error when option is not defined
* Allow template labels
* Add .travis.yml file
* Add experiment travis code
* Fix react example
* Fix bug in item editable

* Fix redraw order
* Fix error when option is not defined
* Allow template labels
* Add .travis.yml file
* Add experiment travis code
* Fix react example
* Make items z-index default to 1

* Fix redraw order
* Fix error when option is not defined
* Allow template labels
* Add .travis.yml file
* Add experiment travis code
* Fix react example
* Add animation to onUpdateTooltip

fixes #2685

* Added showX(YZ)Axis to Graph3d

* Added show_Axis options to docs and playground example

* Resolved merge conflict

* Added show_Axis options to docs and playground example

* change setCustomTimeTitle title parameter, Now could be an string or a function
* Fixed indent and spacing

Related to: https://github.com/almende/vis/pull/2618
Related to: https://github.com/almende/vis/pull/2620