Merge pull request #759 from matrix-org/dbkr/email_notifs

MANIFEST.in

res/templates/mail-Vector.css

res/templates/mail.css

res/templates/notif.html

res/templates/notif.txt

res/templates/notif_mail.html

res/templates/notif_mail.txt

res/templates/room.html

res/templates/room.txt

synapse/app/pusher.py

synapse/config/emailconfig.py

synapse/config/homeserver.py

synapse/config/server.py

synapse/handlers/_base.py

synapse/handlers/message.py

synapse/handlers/room.py

synapse/handlers/search.py

synapse/handlers/sync.py

synapse/notifier.py

synapse/push/emailpusher.py