Merge pull request #400 from matrix-org/daniel/versioning

synapse/federation/transport/server.py

synapse/http/server.py

synapse/http/servlet.py

synapse/rest/client/v1/admin.py

synapse/rest/client/v1/base.py

synapse/rest/client/v1/directory.py

synapse/rest/client/v1/events.py

synapse/rest/client/v1/initial_sync.py

synapse/rest/client/v1/login.py

synapse/rest/client/v1/presence.py

synapse/rest/client/v1/profile.py

synapse/rest/client/v1/push_rule.py

synapse/rest/client/v1/pusher.py

synapse/rest/client/v1/register.py

synapse/rest/client/v1/room.py

synapse/rest/client/v1/voip.py

synapse/rest/client/v2_alpha/_base.py

synapse/rest/client/v2_alpha/account.py

synapse/rest/client/v2_alpha/auth.py

synapse/rest/client/v2_alpha/filter.py