* 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
* Add the source data to Point3d objects in Graph3D; This allows more complex tooltips, using information sent from the server + the source object
* Update PR as requested
* Convert tabs to spaces; Vim config was off, edited in sublime instead
Added a "showLegend" option which can be used to toggle legend drawing
Added legend drawing to 11_tooltips and to playground examples
Added description of showLegend option to documentation