GitLab

* some refines

* more omp refactoring

* format define

* fix merge bug

* some fixes

* fix some warnings

* Apply suggestions from code review

* Apply suggestions from code review

* remove dup codes

* added all necessary includes - fixed build/include_what_you_use error

* fixed the order of includes (build/include_order)

* Added possibility to compile without openmp (useful for clang on Mac)

* Added CMake option to create dylib on MacOS