ITK/Release 4/Modularization/Add a module/itk-module.cmake

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set(DOCUMENTATION "This module contains the central classes of foo-related algorithms ...")

1. itk_module() defines the module dependencies in ITK-Foo
2. ITK-Foo depends on ITK-Common
3. The testing module in ITK-Foo depends on ITK-TestKernel and ITK-#Statistics(besides ITK-Foo)

itk_module(ITK-Foo DEPENDS ITK-Common TEST_DEPENDS ITK-TestKernel ITK-Statistics DESCRIPTION "${DOCUMENTATION}")

1. extra test dependency on ITK-Statistics introduced by itkStatisticalFooTest.

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