SandDance V3 feature changes

• Facets on all chart types
  • Facet wrap
  • Cross-facet
  • Binning
• Sum aggregation
  • Treemaps
  • Strips
• Scatterplot updates
  • Size by
  • grounded
• 3D Lighting (via deck.gl v8)
• history - undo / redo
• snapshots
  • note
  • export
  • import