Add Geocode to LLIIA2020
Created by: slifty
This PR creates a new geocoding information adder and applies it to the LLIIA2020 competition as a first test.
To run ETL you have to add an OpenCage API key.
Some questions:
- Should I make it so the geocoding is skipped if the API key isn't defined (yes)
- Should I add a flag that lets you skip geocoding (yes)
... Ok I'll go add those two things
But it's still ready for review otherwise!