GitLab

Fix affects also the Kernel Library that uses aggregators.

Add concept and features based accumulation.

	* mln/accu/accumulator.hpp
	* mln/accu/accumulator_base.hpp
	* mln/accu/accumulators/count.hpp
	* mln/accu/accumulators/cvxhull.hpp
	* mln/accu/accumulators/cvxhull_impl.hpp
	* mln/accu/accumulators/max.hpp
	* mln/accu/accumulators/mean.hpp
	* mln/accu/accumulators/min.hpp
	* mln/accu/accumulators/sum.hpp
	* mln/accu/composite_accumulator.hpp
	* mln/accu/feature.hpp

	* mln/accu/accumulator.hpp
	* mln/accu/accumulator_base.hpp
	* mln/accu/accumulators/count.hpp
	* mln/accu/accumulators/mean.hpp
	* mln/accu/accumulators/sum.hpp
	* mln/accu/dontcare.hpp
	* mln/core/concept/accumulator.hpp
	* mln/labeling/blobs.hpp
	* tests/CMakeLists.txt
	* tests/accu/CMakeLists.txt
	* tests/accu/count.cpp
	* tests/accu/mean.cpp
	* tests/accu/sum.cpp: New