We should use the same python to start the workers as we do for the main
synapse (ie, the same one used to run synctl.)

this change has been released

Only colourise synctl output when attached to tty

It's quite important that get_missing_events returns the *latest* events in the
room; however we were pulling event ids out of the database until we got *at
least* 10, and then taking the *earliest* of the results.

We also shouldn't really be relying on depth, and should be checking the
room_id.

Ship the email templates as package_data

Fix bug where we raised StopIteration in a generator

Assume isatty is always defined, and catch AttributeError. Also don't bother checking colour==Normal

move the example email templates into the synapse package so that they can be
used as package data, which should mean that all of the packaging mechanisms
(pip, docker, debian, arch, etc) should now come with the example templates.

In order to grandfather in people who relied on the templates being in the old
place, check for that situation and fall back to using the defaults if the
templates directory does not exist.

This made python 3.7 unhappy

Thanks @Half-Shot !!!

Fix incorrect truncation in get_missing_events

run the circle builds in docker containers

It's quite important that get_missing_events returns the *latest* events in the
room; however we were pulling event ids out of the database until we got *at
least* 10, and then taking the *earliest* of the results.

We also shouldn't really be relying on depth, and should be checking the
room_id.

the docker image doesn't have wget

Docker containers spin up faster than entire VMs.

- Improve logging: log things in the right order, include destination and txids
  in all log lines, don't log successful responses twice

- Fix the docstring on TransportLayerClient.send_transaction

- Don't use treq.request, which is overcomplicated for our purposes: just use a
  twisted.web.client.Agent.

- simplify the logic for setting up the bodyProducer

- fix bytes/str confusions

E2E backups

py3: python3.7 hotfixes