Some dataset series have been incorrectly assigned the MD_ScopeCode "dataset". As a heuristic datasets
with a title ending with "(Serie)" will be treated as dataset series.

The metadata has evolved. Now the format of a transfer option can usually be found in its gmd:applicationProfile element.

It must only ignore empty series not empty datasets.

Comprehesive tests for a difficult problem with a dataset from Norderstedt.

Resolve "Serien ohne Distributionen ignorieren"

Closes #26

See merge request !23

Resolve "gemischte deutsch/englische Titel"

Closes #25

See merge request !22

Resolve "Robusteres Hinzufügen der Lizenzinformationen"

Closes #24

See merge request !21