Hook Ponder to Subscriptions

Summary: Adding email aggro email aggro

Test Plan: Added some content; annoyed some coworkers.

Reviewers: epriestley, nh, vrana

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1808

Differential Revision: https://secure.phabricator.com/D3643

src/applications/ponder/controller/PonderAnswerSaveController.php

@@ -60,6 +60,7 @@ final class PonderAnswerSaveController extends PonderController {
       ->setContentSource($content_source);
 
     id(new PonderAnswerEditor())
+      ->setUser($user)
       ->setQuestion($question)
       ->setAnswer($res)
       ->saveAnswer();