Fix transformation of classification and @type

- Look up correct url for library type in @type
- Use http://purl.org/lobid/libtype#n$<library type> for
classification
Update transformation of "url" and "provides"

Make sure that URLs of field "url" and "provides" start with
"http":// or "https://"
Update context

- Add telephone
- Change email, now: http://schema.org/email
- Add dbsID
Update transformation of "Regionalschlüssel"

- Take DBS field "gemeindekennzahl" containing 12-digit
"Regionalschlüssel" and reconstruct missing leading zeros
- Take 032P.n of Sigel containing 8-digit "Allgemeine
Gemeindekennziffer" and look up 12-digit "Regionalschlüssel" in
ags-rs-map.csv
Fix morph test

Update expected result of classification transformation in
test_morph-enriched.xml