Merge branch 'develop' into server2server_tls

WISHLIST.rst

cmdclient/console.py

docs/client-server/howto.rst

docs/client-server/specification.rst

docs/client-server/swagger_matrix/directory

docs/client-server/swagger_matrix/events

docs/client-server/swagger_matrix/login

docs/client-server/swagger_matrix/presence

docs/client-server/swagger_matrix/profile

docs/client-server/swagger_matrix/registration

docs/client-server/swagger_matrix/rooms

docs/server-server/specification.rst

docs/specification.rst

graph/graph.py

jsfiddles/create_room_send_msg/demo.js

jsfiddles/event_stream/demo.js

jsfiddles/example_app/demo.js

jsfiddles/register_login/demo.js

jsfiddles/room_memberships/demo.js

synapse/api/urls.py