Add Enigma Public ObservableHQ EDA Tutorial 
Add Enigma Public ObservableHQ EDA Tutorial 

* Add "community examples" link to my ObservableHQ [Tutorial](https://medium.com/enigma-engineering/exploring-new-york-city-event-permits-with-vega-lite-f83178ff9a8d) on using Enigma Public's API with Vega-Lite
vega/vega-lite,vega/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite