Remove superfluous URL params for queries

Fixes EDOZWO-310
Store local resources in API instead of filesystem

Fixes EDOZWO-297
Merge branch 'EDOZWO-297' into 0.4
Implement inverse fields

Please run update script

Fixes EDOZWO-296
Move add/import actions to menu
Fix URIs for local resources when serializing RDF
Catch exception when unable to parse JSON LD
Update LibRDF
Follow owl:sameAs links when loading linked data

Fixes EDOZWO-312
Implement groupable linked data fields

Please run the update script
Fixes EDOZWO-262
Fix menu callback to add all resource types
Implement search facets

First iteration of EDOZWO-120
Fix entity update time
Add JS version of entity_label
Load labels of resources in facet list
Catch invalid checksum on file upload

Fixes EDOZWO-226
Add relator fields, set title to text_long

All fields without an RDF mapping defined in [1] are omitted for now,
the multiple occurences of dct:contributor all map to
field_edoweb_contributor.

Please run update script

Fixes EDOZWO-323

[1] https://wiki1.hbz-nrw.de/pages/viewpage.action?pageId=3900729
Display related fields as drop-down list

Fixes EDOZWO-300
Update title fields to text_long, apply field weights

Please run update script

Fixes EDOZWO-323
Merge inverse relations into single related resources list

Fixes EDOZWO-296