pkg/utf: fixed layout, added todos, updated docs and homepage pubspec links

pkg/utf/test/utf_test.dart

Index: pkg/utf/test/utf_test.dart
diff --git a/pkg/utf/test/utf_test.dart b/pkg/utf/test/utf_test.dart
index c4a1e94f0ef9ee96baf3583a0bca85e85c434987..86d08e4df98404fc1de0063dc137b33d7ce9dc57 100644
--- a/pkg/utf/test/utf_test.dart
+++ b/pkg/utf/test/utf_test.dart
@@ -2,7 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library utf_test;
+library utf.utf_test;
+
 import "package:expect/expect.dart";
 import "package:utf/utf.dart";