Move LICENSE, AUTHORS, PATENTS into the dart directory.

LICENSE

Index: LICENSE
===================================================================
--- LICENSE	(revision 32351)
+++ LICENSE	(working copy)
@@ -1,51 +0,0 @@
-This license applies to all parts of Dart that are not externally
-maintained libraries. The external maintained libraries used by
-Dart are:
-
-7-Zip - in third_party/7zip
-JSCRE - in runtime/third_party/jscre
-Ant - in third_party/apache_ant
-args4j - in third_party/args4j
-bzip2 - in third_party/bzip2
-Commons IO - in third_party/commons-io
-Commons Lang in third_party/commons-lang
-dromaeo - in samples/third_party/dromaeo
-Eclipse - in third_party/eclipse
-gsutil - in third_party/gsutil
-Guava - in third_party/guava
-hamcrest - in third_party/hamcrest
-Httplib2 - in samples/third_party/httplib2
-JSON - in third_party/json
-JUnit - in third_party/junit
-Oauth - in samples/third_party/oauth2client
-weberknecht - in third_party/weberknecht
-fest - in third_party/fest
-mockito - in third_party/mockito
-
-The libraries may have their own licenses; we recommend you read them,
-as their terms may differ from the terms below.
-
-Copyright 2012, the Dart project authors. All rights reserved.
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-      copyright notice, this list of conditions and the following
-      disclaimer in the documentation and/or other materials provided
-      with the distribution.
-    * Neither the name of Google Inc. nor the names of its
-      contributors may be used to endorse or promote products derived
-      from this software without specific prior written permission.
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.