Add GND index
Add single GND resource to test set
Rename test script
Merge pull request #549 from lobid/issue-hbz-lobid-30-testSetGnd

Issue hbz lobid 30 test set gnd
Update morph to avoid "empty" dct:spatial objects

* fix: URL with spaces now escaped
* update test and testset
Set accept header to json
Merge pull request #550 from lobid/issue-nwbib-53-emptySpatial

Issue nwbib 53 empty spatial
Merge branch 'master' into issue-512-facets