Start templates for standalone result blocks.
Start enabling D3 charts.
Use are shared base template for D3 charts.
Enable D3 barchart engine option.
Make it quicker to check the right template is used.
Remove unused import.
Explain using engine options.
Enable series and histogram engine options.
List files needed to use Vega chart wrapper on D3.
Add Vega v1.3.3 javascript library.
Add Vega as external script.