Add flutter markdown to packages in preparation for deprecation of flutter_markdown package.

packages/flutter_markdown/.cirrus.yml

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+container:
+  image: cirrusci/flutter:latest
+
+test_task:
+  pub_cache:
+    folder: ~/.pub-cache
+  upgrade_script:
+    - flutter channel master
+    - flutter upgrade
+  test_script: flutter test
+
+analyze_task:
+  pub_cache:
+    folder: ~/.pub-cache
+  upgrade_script:
+    - flutter channel master
+    - flutter upgrade
+  analyze_script: flutter analyze

packages/flutter_markdown/.gitignore

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+.DS_Store
+.atom/
+.idea
+.packages
+.dart_tool/
+.pub/
+ios/.generated/
+ios/Flutter/Generated.xcconfig
+ios/Runner/GeneratedPluginRegistrant.*
+packages
+pubspec.lock
+
+# Visual Studio Code related
+.vscode/
+.history/

packages/flutter_markdown/.travis.yml

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+os: linux
+before_script:
+  - git clone https://github.com/flutter/flutter.git --depth 1
+  - export PATH=`pwd`/flutter/bin:`pwd`/flutter/bin/cache/dart-sdk/bin:$PATH
+  - flutter doctor
+script:
+  - flutter test

packages/flutter_markdown/CHANGELOG.md

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+## 0.2.0
+
+* Updated environment sdk constraints to make the package
+  Dart 2 compatible.  As a result, usage of this version and higher 
+  requires a Dart 2 SDK.
+
+## 0.1.6
+
+* Updated `markdown` dependency.
+
+## 0.1.5
+
+* Add `mockito` as a dev dependency. Eliminate use of `package:http`, which
+  is no longer part of Flutter.
+
+## 0.1.4
+
+* Add `li` style to bullets 
+
+## 0.1.3
+
+* Add `path` and `http` as declared dependencies in `pubspec.yaml`
+
+## 0.1.2
+
+* Add support for horizontal rules.
+* Fix the `onTap` callback on images nested in hyperlinks
+
+## 0.1.1
+
+* Add support for local file paths in image links. Make sure to set the
+  `imageDirectory` property to specify the base directory containing the image
+  files.
+
+## 0.1.0
+
+* Roll the dependency on `markdown` to 1.0.0
+* Add a test and example for image links
+* Fix the `onTap` callback on hyperlinks
+
+## 0.0.9
+
+* First published version

packages/flutter_markdown/LICENSE

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+// Copyright 2017 Google, Inc. 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.

packages/flutter_markdown/README.md

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+# Flutter Markdown
+[![pub package](https://img.shields.io/pub/v/flutter_markdown.svg)](https://pub.dartlang.org/packages/flutter_markdown) 
+[![Build Status](https://travis-ci.org/flutter/flutter_markdown.svg?branch=master)](https://travis-ci.org/flutter/flutter_markdown)
+
+
+A markdown renderer for Flutter. It supports the
+[original format](https://daringfireball.net/projects/markdown/), but no inline
+html.
+
+## Getting Started
+
+Using the Markdown widget is simple, just pass in the source markdown as a
+string:
+
+    new Markdown(data: markdownSource);
+
+If you do not want the padding or scrolling behavior, use the MarkdownBody
+instead:
+
+    new MarkdownBody(data: markdownSource);
+
+By default, Markdown uses the formatting from the current material design theme,
+but it's possible to create your own custom styling. Use the MarkdownStyle class
+to pass in your own style. If you don't want to use Markdown outside of material
+design, use the MarkdownRaw class.
+
+## Image support
+
+The `Img` tag only supports the following image locations. It specifically
+does not support image locations referring to bundled assets.
+
+* From the network: Use a URL prefixed by either `http://` or `https://`.
+
+* From local files on the device: Use an absolute path to the file, for example by
+  concatenating the file name with the path returned by a known storage location,
+  such as those provided by the [`path_provider`](https://pub.dartlang.org/packages/path_provider)
+  plugin.

packages/flutter_markdown/example/example.dart

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+// Copyright 2016 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.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_markdown/flutter_markdown.dart';
+
+const String _markdownData = """# Markdown Example
+Markdown allows you to easily include formatted text, images, and even formatted Dart code in your app.
+
+## Styling
+Style text as _italic_, __bold__, or `inline code`.
+
+- Use bulleted lists
+- To better clarify
+- Your points
+
+## Links
+You can use [hyperlinks](hyperlink) in markdown
+
+## Images
+
+You can include images:
+
+![Flutter logo](https://flutter.io/images/flutter-mark-square-100.png#100x100)
+
+## Markdown widget
+
+This is an example of how to create your own Markdown widget:
+
+    new Markdown(data: 'Hello _world_!');
+
+## Code blocks
+Formatted Dart code looks really pretty too:
+
+```
+void main() {
+  runApp(new MaterialApp(
+    home: new Scaffold(
+      body: new Markdown(data: markdownData)
+    )
+  ));
+}
+```
+
+Enjoy!
+""";
+
+void main() {
+  runApp(new MaterialApp(
+    title: "Markdown Demo",
+    home: new Scaffold(
+      appBar: new AppBar(title: const Text('Markdown Demo')),
+      body: const Markdown(data: _markdownData)
+    )
+  ));
+}

packages/flutter_markdown/flutter_markdown.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/build" />
+      <excludeFolder url="file://$MODULE_DIR$/example/packages" />
+      <excludeFolder url="file://$MODULE_DIR$/packages" />
+      <excludeFolder url="file://$MODULE_DIR$/test/packages" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Dart SDK" level="project" />
+    <orderEntry type="library" name="Dart Packages" level="project" />
+  </component>
+</module>

packages/flutter_markdown/lib/flutter_markdown.dart

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+// Copyright 2016 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 library to render markdown formatted text.
+library flutter_markdown;
+
+export 'src/builder.dart';
+export 'src/style_sheet.dart';
+export 'src/widget.dart';