Replace Boost semaphore by multi platform custom semaphore implementation from https://github.com/preshing/cpp11-on-multicore/blob/master/common/sema.h
Replace Boost semaphore by multi platform custom semaphore implementation from https://github.com/preshing/cpp11-on-multicore/blob/master/common/sema.h

egartner/MR-maze-exploration,egartner/MR-maze-exploration,egartner/MR-maze-exploration,egartner/MR-maze-exploration,egartner/MR-maze-exploration