Merge branch 'page-search' into 'master'

VERSION

arkindex/documents/api/iiif.py

arkindex/documents/api/search.py

arkindex/documents/indexer.py

arkindex/documents/management/commands/reindex.py

arkindex/documents/models.py

arkindex/documents/search.py

arkindex/documents/serializers/search.py

arkindex/documents/tasks.py

arkindex/documents/tests/test_search.py

arkindex/documents/urls.py

arkindex/documents/views.py

arkindex/project/api_v1.py

arkindex/project/mixins.py

arkindex/project/settings.py

arkindex/templates/base.html

arkindex/templates/documents/page.html

arkindex/templates/documents/pages.html

arkindex/templates/elastic/search_acts.json

arkindex/templates/elastic/search_nested.json