Move files in Phabricator one level up

Summary:
- `kill_init.php` said "Moving 1000 files" - I hope that this is not some limit in `FileFinder`.
- [src/infrastructure/celerity] `git mv utils.php map.php; git mv api/utils.php api.php`
- Comment `phutil_libraries` in `.arcconfig` and run `arc liberate`.

NOTE: `arc diff` timed out so I'm pushing it without review.

Test Plan:
/D1234
Browsed around, especially in `applications/repository/worker/commitchangeparser` and `applications/` in general.

Auditors: epriestley

Maniphest Tasks: T1103

src/applications/differential/controller/DifferentialController.php

@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * Copyright 2012 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+abstract class DifferentialController extends PhabricatorController {
+
+  protected function allowsAnonymousAccess() {
+    return PhabricatorEnv::getEnvConfig('differential.anonymous-access');
+  }
+
+  public function buildStandardPageResponse($view, array $data) {
+
+    require_celerity_resource('differential-core-view-css');
+
+    $viewer_is_anonymous = !$this->getRequest()->getUser()->isLoggedIn();
+
+    $page = $this->buildStandardPageView();
+    $page->setApplicationName('Differential');
+    $page->setBaseURI('/differential/');
+    $page->setTitle(idx($data, 'title'));
+    $page->setGlyph("\xE2\x9A\x99");
+    $page->appendChild($view);
+    $page->setIsLoggedOut($viewer_is_anonymous);
+    $page->setSearchDefaultScope(PhabricatorSearchScope::SCOPE_OPEN_REVISIONS);
+
+    $response = new AphrontWebpageResponse();
+    return $response->setContent($page->render());
+  }
+
+}