Added .scss transform

pkg/polymer/lib/src/transform.dart

Index: pkg/polymer/lib/src/transform.dart
diff --git a/pkg/polymer/lib/src/transform.dart b/pkg/polymer/lib/src/transform.dart
index d2bf910dc97981ef9a76b8cda89ce591c26e060e..d4e4693564775fe58973f0ea133358b018645ad7 100644
--- a/pkg/polymer/lib/src/transform.dart
+++ b/pkg/polymer/lib/src/transform.dart
@@ -7,6 +7,7 @@
 library polymer.src.transform;
 
 import 'package:observe/transform.dart';
+import 'package:csslib/transform.dart';
 import 'transform/code_extractor.dart';
 import 'transform/import_inliner.dart';
 import 'transform/script_compactor.dart';
@@ -21,6 +22,7 @@ export 'transform/polyfill_injector.dart';
 var phases = [
   [new InlineCodeExtractor()],
   [new ObservableTransformer()],
+  [new ScssTransformer()],

[Siggi Cherem (dart-lang), 2013/09/08 20:31:33]

we should be able to run this in parallel with other phases. So maybe add it to
the same list as Observable?

(I'm thinking that eventually the code-extractor will extract the .css from the
html

   [new ImportedElementInliner()],
   [new ScriptCompactor()],
   [new PolyfillInjector()]