* Modify QuerySharedUsers to handle counts/include/exclude
We will need this functionality when working out whether to
send device list changes to users who have joined/left a room.
* Linting
* Remove membership table from account DB
And make code which needs that data use the currentstate server
* Unbreak tests; use a membership enum for space
* Add a new component: currentstateserver
- Add a skeleton for it, with databases and a single query method.
- Add integration tests for it.
- Add listen/address fields in the config (breaking as this will force people to specify this to validate)
Not currently hooked up to anything yet.
* Unbreak config tests
* Add current_state to sample config
* comments
