Removed IndexDocument
Merge branch 'master' into es-document-index
Changed levels
Merge branch 'master' into es-document-index
Merge branch 'master' into es-document-index

Conflicts:
	whelk-core/src/main/groovy/components/ElasticSearch.groovy
Merge branch 'master' into es-document-index
No need to handle multiple terms fields.
Saved
Basic link expander structure, and configured defs for ngram search
Merge branch 'master' into es-document-index
Merge branch 'master' into es-document-index