Allow the developer to set the scale of the graph
Add setGraphVisibility method
Use 3D lines for the axes
Make the grid lines transparent
Renamed gridScale to graphScale
Added toggleGraphVisibility method
Fixed scaling and redraw bugs
Added depth constants for renderTop
Removed opacity, adjusted grid line thickness
Modified per review
Use false instead of gridLines.visible
Merge pull request #232 from virtual-world-framework/branch/graph-updates

Branch/graph updates
Working on getting soundGroups working - currently PlayingInstance.sourceNode.onEnded is not getting called correctly.
Sound queue working... in process of adding duck and cut capabilities.
PR Comment Fixes