Merge branch 'annotation-score' into 'master'

arkindex/documents/importer.py

arkindex/documents/management/commands/import_annotations.py

arkindex/documents/management/commands/import_manifest.py

arkindex/documents/migrations/0002_element_zone.py

arkindex/documents/models.py

arkindex/documents/search.py

arkindex/documents/serializers.py

arkindex/documents/tests.py

arkindex/images/importer.py

arkindex/images/migrations/0003_auto_20180516_2111.py

arkindex/images/migrations/0004_auto_20180517_0930.py

arkindex/images/models.py

arkindex/images/tests.py

arkindex/project/tools.py