removed merge-stream

* Fix groupEditable
* Fix group drag in vertical direction bug
* Fix indentation

* Multifont node and edge labels
* adjust documentation
* rework mod-font property inheritance
* Node max/min widths, min heights; Edge max widths
* Accumulate sizes correctly for unconstrained multipoint labels
* handle font.multi when groupOptions.font is not declared
* propagate label fonts on changes, not just creation
* Allow top-level constraint numbers
* accumulate width and empty lines appropriately

* add pointer position to zoom event
* Update docs with zoom api

* Fix mouse zoom on currentTime
* Fix customTime mousewheel bug

* Fix left/right group alignment
* Add _setDOM and remove scrollbar when there is no scrolling
* Readd calculation of scrollbar width on resize

Readied 3d camera orientation code for merge into develop branch

* fixed label disappearing bug for large axis values in Graph3d
* only fixed label disappearing bug for large axis values in Graph3d
* very only fixed label disappearing bug for large axis values in Graph3d

* { manipulation: { editEdge: { editWithoutDrag: function } } } edits an edge without dragging.
* An example of editing network edges without dragging, enabling label creation / change

* Fix brackets problem
* Fix timeStep.getClassName

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

* Added group option to change the visibility of a group
* updated the groupsEditable example page to demo the use of this feature
* updated the timeline documentation to describe this option

* Fixed bug introduced in #2284 where overrideItems is set to true when boolean is provided
* Added the option of supplying object to item.editable with updateTime, updateGroup, and remove functioning similarly to timeline.editable but only on a single item
* Updated Documentation to reflect the new feature
* Updated the individualEditableItems example page to show feature usage.

Changed "an" to "and" in graph3D docs

* Fixes #2273
* Remove console.log
* Fix for zoomable false

* Fixes #2273
* Remove console.log
* Fix for zoomable false
* Fix initial scrolling with verticalScroll and fix example

Timeline: updated group.content description to show that it can be an element

Update index.html of Graph3D

dataColor.fill and dataFill.stroke had wrong descriptions.

* Timeline:
* Add overrideItems sub-property to timeline.editable
* Change behavior to override item.editable when overrideItems=true
* Added new example for timeline/editing to higlight differeing editable behaviors.
* Update timeline doc to reflect addition of timeline.editable.overrideItems
* Timeline - fixed logic oversights found in editable override testing
* Timeline - enable changeGroup when item.editable = true and not overriden
* Timeline - Small format changes to documentation and example pages for overrideItems

* Important performance enhancement supporting incremental changes to large graphs, these were too slow due to doing a full item conversion on each add().
Note: the data handling side of graph2d is currently somewhat over-engineered (=too complex) It can use some simplification....

* Fixed style based on feedback.

marked development version as SNAPSHOT

v4.17 release

updated how_to_puplish

fixes DataView.refresh bug introduced with #2189

fixed bug introduced by #2248