Merged geologos as a geozones command

[noirbizarre]

This PR merges geologos as a geozones command. This introduce the geozones logos command allowing to keep logic in sync with the current state of geozone.

There are subtle changes:

• downloaded images and archive respect DL_DIR and DIST_DIR
• Define a user agent to follow https://www.mediawiki.org/wiki/API:Etiquette
• Handle the logo property in addition to flag and blazon
• Prevent timeout error while iterating over MongoDB cursor