refactor: Policies Architecture (#1016)

* add policy serialize method

* Add policies to collection responses

* wip

* test: remove .only

* refactor: Return policies with team and document requests

* store policies on the client

* refactor: drive admin UI from policies

server/presenters/policy.js

@@ -0,0 +1,13 @@
+// @flow
+import { User } from '../models';
+
+type Policy = { id: string, abilities: { [key: string]: boolean } };
+
+export default function present(user: User, objects: Object[]): Policy[] {
+  const { serialize } = require('../policies');
+
+  return objects.map(object => ({
+    id: object.id,
+    abilities: serialize(user, object),
+  }));
+}