Add International Sitemap

• Add International Sitemap views and class so that the Sitemap will show the request domain and it is possible to adjust items based on which CountrySite Sitemap is being viewed
• Fix International fieldset view in admin (no double appearances)

Update options for managers and middleware + localization

• Make using MaxMind GeoIP localization optional in middleware.
• Add management command for downloading and extracting GeoIP library. Can be executed periodically to keep IP localization up to date.
• Option to disable by_country or by_language manager method and make them return the full queryset instead.
• Update middleware (order) to work nicely with Django i18n language middleware.

First release

Pre-release for testing in test production environments.