Merge branch 'search-endpoint-v2' into 'master'

arkindex/documents/api/search.py

arkindex/documents/indexer_v2.py

arkindex/documents/management/commands/reindex_v2.py

arkindex/documents/serializers/elements.py

arkindex/documents/serializers/search.py

arkindex/documents/tests/commands/test_reindex_v2.py

arkindex/documents/tests/test_corpus.py

arkindex/documents/tests/test_indexer_v2.py

arkindex/documents/tests/test_search_api_v2.py

arkindex/project/api_v1.py

arkindex/project/settings.py