Websocket Support (#937)

* Atom / RSS meta link

* Spike

* Feeling good about this spike now

* Remove document.collection

* Remove koa.ctx from all presenters to make them portable outside requests

* Remove full serialized model from events
Move events.add to controllers for now, will eventually be in commands

* collections.create event
parentDocument -> parentDocumentId

* Fix up deprecated tests

* Fixed: Doc creation

* documents.move

* Handle collection deleted

* 💚

* Authorize room join requests

* Move starred data structure
Account for documents with no context on sockets

* Add socket.io-redis

* Add WEBSOCKETS_ENABLED env variable to disable websockets entirely for self hosted
New installations will default to true, existing installations to false

* 💚 No need for promise response here

* Reload notice

server/api/hooks.test.js

@@ -1,6 +1,6 @@
 /* eslint-disable flowtype/require-valid-file-annotation */
 import TestServer from 'fetch-test-server';
-import app from '..';
+import app from '../app';
 import { Authentication } from '../models';
 import { flushdb, seed } from '../test/support';
 import { buildDocument, buildUser } from '../test/factories';