Moved docgen out of the sdk into pkg/

Moved docgen out of the sdk into pkg/

BUG=
R=efortuna@google.com

Committed: https://code.google.com/p/dart/source/detail?r=23935

[Bob Nystrom, 2013-06-12 21:10:52]

Drive-by comment!

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/examples/test.dart
File pkg/docgen/examples/test.dart (right):

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/examples/test.dart...
pkg/docgen/examples/test.dart:1: /**
Name the folder "example" instead of "examples".

[Emily Fortuna, 2013-06-12 21:10:56]

add copyright. then lgtm

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/examples/test.dart
File pkg/docgen/examples/test.dart (right):

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/examples/test.dart...
pkg/docgen/examples/test.dart:1: /**
can you add the copyright notice at the top of this file? It should be something
like:

// Copyright (c) 2013, 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.

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/lib/dart2yaml.dart
File pkg/docgen/lib/dart2yaml.dart (right):

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/lib/dart2yaml.dart...
pkg/docgen/lib/dart2yaml.dart:1: /**
please add copyright notice at the top of this file, too. I forgot that on your
first checkin.

[Tate Mandel, 2013-06-12 21:18:41]

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/examples/test.dart
File pkg/docgen/examples/test.dart (right):

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/examples/test.dart...
pkg/docgen/examples/test.dart:1: /**
On 2013/06/12 21:10:52, Bob Nystrom wrote:
> Name the folder "example" instead of "examples".

Done.

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/examples/test.dart...
pkg/docgen/examples/test.dart:1: /**
On 2013/06/12 21:10:56, Emily Fortuna wrote:
> can you add the copyright notice at the top of this file? It should be
something
> like:
> 
> // Copyright (c) 2013, 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.

Done.

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/lib/dart2yaml.dart
File pkg/docgen/lib/dart2yaml.dart (right):

https://codereview.chromium.org/16839004/diff/1/pkg/docgen/lib/dart2yaml.dart...
pkg/docgen/lib/dart2yaml.dart:1: /**
On 2013/06/12 21:10:56, Emily Fortuna wrote:
> please add copyright notice at the top of this file, too. I forgot that on
your
> first checkin.

Done.

[Emily Fortuna, 2013-06-12 21:28:57]

lgtm

[Tate Mandel, 2013-06-12 21:31:30]

Committed patchset #2 manually as r23935 (presubmit successful).