Add look-up tables for transformation of organisation data

- ags-rs-map.csv: Maps "Amtlicher Gemeindeschlüssel" onto
"Regionalschlüssel"
- geo-latitude-map.csv and geo-longitude-map.csv: Map address
data onto geo coordinates
- geonames.map.csv: Maps "Amtlicher Gemeindeschlüssel" onto
ids for generation of geonames.org-URIs
- libtype-map.csv: Maps content of Sigel field 035E.f ("Typ der
Einrichtung") on URI