update polymer, nodebind, and templatebinding

pkg/polymer/test/mirror_loader_test.dart

Index: pkg/polymer/test/mirror_loader_test.dart
diff --git a/pkg/polymer/test/mirror_loader_test.dart b/pkg/polymer/test/mirror_loader_test.dart
index dd34fe58eedafae7cf360a90d3ffa985594c38bf..d8c1f9d33be27a6d94c96d7a10d64897fabad674 100644
--- a/pkg/polymer/test/mirror_loader_test.dart
+++ b/pkg/polymer/test/mirror_loader_test.dart
@@ -18,6 +18,12 @@ import 'mirror_loader_4.dart' as m4;
 main() {
   useHtmlConfiguration();
 
+  // Prevent unused import messages.

[Siggi Cherem (dart-lang), 2014/06/03 02:23:44]

You can also put them in dartdoc comments, that would get rid of the warnings
too :) 

[Jennifer Messerly, 2014/06/04 04:42:16]

Done.

+  m1.XA;
+  m2.XA;
+  m3.XB;
+  m4.XA;
+
   test('registered correctly', () {
     expect(_discover(#mirror_loader_test1).length, 1);
     expect(_discover(#mirror_loader_test2).length, 1);