Multipolygon: Examples for mappers added to Wiki

Stimulated by and based on many discussions and contributions in the Forum users: Germany I’ve outlined some concrete examples for mappers to provide this knowledge at one place more condense and more permanent. The examples are in English under Relation Multipolygon: Examples for mappers as well as in German under Relation Multipolygon: Beispiele für Kartografen. I think the present examples are more suitable for developers.

Comments, corrections, improvements, suggestions are highly welcome.