* Add QueryDeviceMessages to serve up device keys and stream IDs * Consume key change events in fedsender Don't yet send them to destinations as we haven't worked them out yet * Send device list updates to all required servers * Glue it all together
* Add QueryOneTimeKeys for /sync extensions * Unbreak tests * Produce OTK counts in /sync response * Linting
Hook some things up to call it as well.
Also add a README which outilnes how things will work.
