Post to Slack (#603)

* Migrations

* WIP: Integration model, slack perms / hooks

* So so rough it pains me. Building this new model is revealing just how much needs to be refactored

* Working connect and post

* Cleanup UI, upating documents

* Show when slack command is connected

* stash

* 💚

* Add documents.update trigger

* Authorization, tidying

* Fixed integration policy

* pick integration presenter keys

server/api/index.js

@@ -13,6 +13,7 @@ import views from './views';
 import hooks from './hooks';
 import apiKeys from './apiKeys';
 import team from './team';
+import integrations from './integrations';
 
 import validation from './middlewares/validation';
 import methodOverride from '../middlewares/methodOverride';
@@ -74,6 +75,7 @@ router.use('/', views.routes());
 router.use('/', hooks.routes());
 router.use('/', apiKeys.routes());
 router.use('/', team.routes());
+router.use('/', integrations.routes());
 
 // Router is embedded in a Koa application wrapper, because koa-router does not
 // allow middleware to catch any routes which were not explicitly defined.