Add the possibility to set api keys outside of the library

We'll need this for the Cyclocity system, but easily more systems
will need an API KEY in the future.
Update Cyclocity to use the new developer API from JCDecaux

More info at https://developer.jcdecaux.com
Update the cyclocity extractor script
Add the "filler" script, to complete metadata files

This script is a huge pile of garbage, but works. It is meant to
add geodata and slug information on unfilled data files. It accepts
an interactive prompt, to decide between different geodata values.

Instead of repeating code in each extractor, it feels better in a
separate script.
Update the cyclocity data using the extractor + filler combo
Fix broward being incorrectly geopositioned