First step with cmake, units, tools, basic components

.gitmodules

experimental/CMakeLists.txt

experimental/CPackConfig.cmake

experimental/CTestConfig.cmake

experimental/examples/CMakeLists.txt

experimental/examples/sandbox.cpp

experimental/include/scalfmm/concepts/library.hpp

experimental/include/scalfmm/config/scalfmm-config.hpp.cmake

experimental/include/scalfmm/container/morton_curve.hpp

...rimental/include/scalfmm/container/particle_container.hpp

experimental/include/scalfmm/container/point.hpp

...rimental/include/scalfmm/container/variadic_container.hpp

experimental/include/scalfmm/memory/aligned_allocator.hpp

experimental/include/scalfmm/meta/is_valid.hpp

experimental/include/scalfmm/meta/traits.hpp

experimental/include/scalfmm/tools/catch.hpp

experimental/include/scalfmm/tools/colorized.hpp

experimental/include/scalfmm/tools/json.hpp

experimental/include/scalfmm/tools/progress_bar.hpp

experimental/include/scalfmm/tree/tree.hpp