examples: mark examples as unmaintained

Examples/Annotation/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Array/Cxx/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/DataManipulation/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/GUI/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/GUI/Qt/Events/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/GUI/Win32/SimpleCxx/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Graphics/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/IO/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/ImageProcessing/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Infovis/Java/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Infovis/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/LIC/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Medical/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/ParallelProcessing/MPI/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Rendering/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Statistics/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Tutorial/Step1/Java/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Tutorial/Step1/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Tutorial/Step2/Java/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples

Examples/Tutorial/Step2/Python/UNMAINTAINED.md

+# Unmaintained examples
+
+All of these files in this directory are unmaintained. At some
+future point they will be deleted. To save them, please offer them
+under the `BUILD_EXAMPLES` CMake flag or port them to the
+[VTK Wiki Examples][] repository.
+
+[VTK Wiki Examples]: https://github.com/lorensen/VTKExamples