Move core and coreimpl from corelib/ to lib/core and lib/coreimpl.

corelib/src/print.dart

Index: corelib/src/print.dart
diff --git a/corelib/src/print.dart b/corelib/src/print.dart
deleted file mode 100644
index 0bdb575d9762481ba1528e881542887b277aa24a..0000000000000000000000000000000000000000
--- a/corelib/src/print.dart
+++ /dev/null
@@ -1,7 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// 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.
-
-void print(Object object) {
-  PrintImplementation.print(object);
-}