Add some higher resolution default user images

Summary: Looks nicer on profiles, cards. Added some additional colors.

Test Plan: change my avatar a few times

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: avivey, Korvin

Differential Revision: https://secure.phabricator.com/D17416

resources/celerity/map.php

···
     'rsrc/favicons/mstile-70x70.png' => '5edce7b8',
     'rsrc/image/BFCFDA.png' => 'd5ec91f4',
     'rsrc/image/actions/edit.png' => '2fc41442',
-    'rsrc/image/avatar.png' => 'e132bb6a',
+    'rsrc/image/avatar.png' => '17d346a4',
     'rsrc/image/checker_dark.png' => 'd8e65881',
     'rsrc/image/checker_light.png' => 'a0155918',
     'rsrc/image/checker_lighter.png' => 'd5da91b6',

src/applications/people/controller/PhabricatorPeopleProfilePictureController.php

···
       'user7.png',
       'user8.png',
       'user9.png',
-      );
+    );
     foreach ($builtins as $builtin) {
       $file = PhabricatorFile::loadBuiltin($viewer, $builtin);
       $images[$file->getPHID()] = array(