[image_picker] Added image_picker_for_windows.

packages/image_picker/image_picker_windows/AUTHORS

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+# Below is a list of people and organizations that have contributed
+# to the Flutter project. Names should be added to the list like so:
+#
+#   Name/Organization <email address>
+
+Google Inc.
+Alexandre Zollinger Chohfi <[email protected]>

packages/image_picker/image_picker_windows/CHANGELOG.md

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+# 0.1.0
+
+* Initial Windows support.

packages/image_picker/image_picker_windows/LICENSE

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+Copyright 2013 The Flutter 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.

packages/image_picker/image_picker_windows/README.md

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+# image\_picker\_windows
+
+A Windows implementation of [`image_picker`][1].
+
+### pickImage()
+The arguments `source`, `maxWidth`, `maxHeight`, `imageQuality`, and `preferredCameraDevice` are not supported on Windows.
+
+### pickVideo()
+The arguments `source`, `preferredCameraDevice`, and `maxDuration` are not supported on Windows.
+
+## Usage
+
+### Import the package
+
+This package is not yet [endorsed](https://flutter.dev/docs/development/packages-and-plugins/developing-packages#endorsed-federated-plugin), which means you need to add 
+not only the `image_picker`, as well as the `image_picker_windows`.

packages/image_picker/image_picker_windows/example/README.md

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+# image_picker_windows_example
+
+Demonstrates how to use the image_picker_windows plugin.
+
+## Getting Started
+
+For help getting started with Flutter, view our online
+[documentation](https://flutter.dev/).