Merge pull request #307 from matrix-org/erikj/search

synapse/handlers/__init__.py

synapse/handlers/search.py

synapse/rest/client/v1/room.py

synapse/storage/__init__.py

synapse/storage/_base.py

synapse/storage/events.py

synapse/storage/room.py

synapse/storage/schema/delta/24/fts.py

synapse/storage/search.py

synapse/storage/state.py