Move "Macros" to a first-class application

Summary:
This is mostly to unblock D3547.

  - Move "Macros" to a first-class application called "Macros".
  - After D3547, this application will also house "Memes" (macros with text on them).
  - This will also make them easier to find; the top navigational query I field is "where are image macros?" nowadays, since it's not intuitive they're part of files.
  - This makes some of the UI mobile-aware but doesn't set the `device` flag yet, since there are still some missing pieces.
  - I'll separate storage out and continue modernizing the UI as we unblock and integrate D3547.

Test Plan: Created, edited and deleted macros. Viewed files.

Reviewers: btrahan, vrana, teisenbe

Reviewed By: vrana

CC: aran

Maniphest Tasks: T175

Differential Revision: https://secure.phabricator.com/D3572

src/applications/macro/storage/PhabricatorFileImageMacro.php

@@ -0,0 +1,45 @@
+<?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.
+ */
+
+final class PhabricatorFileImageMacro extends PhabricatorFileDAO {
+
+  protected $filePHID;
+  protected $name;
+
+  public function getConfiguration() {
+    return array(
+      self::CONFIG_TIMESTAMPS => false,
+    ) + parent::getConfiguration();
+  }
+
+  static public function newFromImageURI($uri, $file_name, $image_macro_name) {
+    $file = PhabricatorFile::newFromFileDownload($uri, $file_name);
+
+    if (!$file) {
+      return null;
+    }
+
+    $image_macro = new PhabricatorFileImageMacro();
+    $image_macro->setName($image_macro_name);
+    $image_macro->setFilePHID($file->getPHID());
+    $image_macro->save();
+
+    return $image_macro;
+  }
+}
+