Deprecate Math object in corelib in favor of dart:math library.

samples/swarm/swarmlib.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
 #library("swarmlib");
 
 #import('dart:coreimpl');
 #import('dart:json');
 #import('dart:html');
+#import('dart:math', prefix: 'Math');
 #import('../ui_lib/base/base.dart');
 #import('../ui_lib/view/view.dart');
 #import('../ui_lib/observable/observable.dart');
 #import('../ui_lib/touch/touch.dart');
 #import('../ui_lib/util/utilslib.dart');
 
 #source('App.dart');
 #source('BiIterator.dart');
 #source('ConfigHintDialog.dart');
 #source('HelpDialog.dart');
 #source('SwarmState.dart');
 #source('SwarmViews.dart');
 #source('SwarmApp.dart');
 #source('DataSource.dart');
 #source('Decoder.dart');
 #source('UIState.dart');
 #source('Views.dart');
 #source('CSS.dart');
 
 // TODO(jimhug): Remove this when deploying.
 #source('CannedData.dart');