Fix licensing headers and move most third party code to third_party/...

gclient.py

Index: gclient.py
===================================================================
--- gclient.py	(revision 37929)
+++ gclient.py	(working copy)
@@ -1,18 +1,7 @@
 #!/usr/bin/python
-#
-# Copyright 2008 Google Inc.  All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# Copyright (c) 2010 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
 
 """A wrapper script to manage a set of client modules in different SCM.