ITK/Release 4/Modularization/Add new classes

It is helpful to understand the structure of a module before adding a class to it, please read Add a module first.

• Which module it belongs to?

  The module grouping is listed in ITK/CMake/ITKGroup.cmake.

• Does the new class brings in new dependency to this module?

  If yes, then you need to edit the module's dependency list in itk-module.cmake.
  

• Put code in the right directory

  If it is a template class, put the header and the template files into "include" directory.
  If it is a library source class, put the cxx file into "src" directory, and the corresponding header into "include" directory. Also need to edit the src/CMakeLists.txt accordingly.

• Add unit tests

  Edit the test/CMakeList.txt according to the notes in Add tests