* mln/core/image/zip_image.hpp,
	* mln/core/image/zip_image_pixel.hpp,
	* mln/core/image/zip_image_value_iterator.hpp: New
	* tests/CMakeLists.txt,
	* tests/bench_zip_iterator.cpp,
	* tests/core/image/zip_image.cpp:
	Add tests for zip image.