Start moving non-platform libraries from lib/ to pkg/ .

utils/apidoc/apidoc.dart

Index: utils/apidoc/apidoc.dart
===================================================================
--- utils/apidoc/apidoc.dart	(revision 10373)
+++ utils/apidoc/apidoc.dart	(working copy)
@@ -110,7 +110,8 @@
     }
   });
   apidocLibraries.add(doc.scriptDir.append('../../lib/unittest/unittest.dart'));
-  apidocLibraries.add(doc.scriptDir.append('../../lib/i18n/intl.dart'));
+  apidocLibraries.add(doc.scriptDir.append('../../pkg/i18n/intl.dart'));
+  apidocLibraries.add(doc.scriptDir.append('../../pkg/logging/logging.dart'));
 
   print('Generating docs...');
   final apidoc = new Apidoc(mdn, htmldoc, outputDir, mode, generateAppCache);