Add mail/feed support to PhamePost

Summary: Allows feed stories and mail for new Phame Posts.

Test Plan: Write Post, Get Mail

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D14426

resources/sql/autopatches/20151106.phame.post.mailkey.1.sql

@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_phame.phame_post
+  ADD mailKey binary(20) NOT NULL;

resources/sql/autopatches/20151106.phame.post.mailkey.2.php

@@ -0,0 +1,18 @@
+<?php
+
+$table = new PhamePost();
+$conn_w = $table->establishConnection('w');
+$iterator = new LiskMigrationIterator($table);
+foreach ($iterator as $post) {
+  $id = $post->getID();
+
+  echo pht('Adding mail key for Post %d...', $id);
+  echo "\n";
+
+  queryfx(
+    $conn_w,
+    'UPDATE %T SET mailKey = %s WHERE id = %d',
+    $table->getTableName(),
+    Filesystem::readRandomCharacters(20),
+    $id);
+}