fix regular expression in version finder We should not include the Query-String in the search.

mv ontology-version api handling to api namespace This will actually support a show on ontology-versions via json.

support date-references in /ref/ loc/ids.

add commit and branch references as well Additionally to version-numbers the /ref syntax now also supports commits and branches.

convert ref-version route to generalized specroute This route should support, with the help of the OntologyVersionFinder, multiple reference arguments, e.g. version-numbers, commits, branches and so forth.