Update non mappable items
Update README.md

- add country POLY file to requirements
- explain --show_coordinates_from_osm option
- explain data/wikipedia/non_mappable/redirects usage
- how to translate
- more credits
Do not create pages with regions and map if not requested

* remove hardcoded regions names, read them from config.cfg
* do not create regions page and subpages if
there is not a list of regions names in config.cfg
* do not create map page if not --show_link_to_wikipedia_coordinates
* remove redundant code for index pages rendering
Update .gitignore