Use sprites for (nearly) all application icons

Summary: Sprites for everyone.

Test Plan: Loaded `/applications/`.

Reviewers: btrahan, chad, vrana

Reviewed By: vrana

CC: aran

Maniphest Tasks: T1569

Differential Revision: https://secure.phabricator.com/D3280

src/applications/project/application/PhabricatorApplicationProject.php

@@ -30,6 +30,10 @@ final class PhabricatorApplicationProject extends PhabricatorApplication {
     return '/project/';
   }
 
+  public function getAutospriteName() {
+    return 'projects';
+  }
+
   public function getRoutes() {
     return array(
       '/project/' => array(