Automatically reload the "monitor" page.

Worker details will appear when the instance is ready.
Update instructions to reflect auto-refresh.

With the auto-refresh, connection details will appear without
manually reloading the page.
Only auto-refresh until the machine is ready.

We don't need to keep refreshing once the machine is ready for SSH
connections.
Merge branch 'master' of https://github.com/mozilla/telemetry-server into python-lzma