MacOS build support

[EgorOrachyov]

Current master version could not be compiled on macOS by gcc or clang (Mac version of clang: 10) because of the following problems:

1. Use of std c++17 functionality, which was not implemented by Apple in current os release 10.14 Mojave.
   Filesystem usage possibly could be fixed by global.h core/utils modification.

In file included from alignment/camerasCalibration/camerasCalibrationFunc.cpp:1:
In file included from ../../corecvs/core/alignment/camerasCalibration/camerasCalibrationFunc.h:2:
In file included from ../../corecvs/core/function/function.h:15:
../../corecvs/core/utils/global.h:408:12:
fatal error: 'experimental/filesystem' file not found
# include <experimental/filesystem>
^~~~~~~~~~~~~~~~~~~~~~~~~

2. Use of not standardized functionality from C11. Apple as vendor for macOS do not want
   to support this features. GCC 9 for macOS has own std c++17 headers and compiled libs,
   however C libs and headers could be provided and installed only by Apple.

In file included from alignment/camerasCalibration/camerasCalibrationFunc.cpp:1:
In file included from ../../corecvs/core/alignment/camerasCalibration/camerasCalibrationFunc.h:2:
In file included from ../../corecvs/core/function/function.h:16:
In file included from ../../corecvs/core/math/matrix/matrix.h:17:
In file included from ../../corecvs/core/buffers/abstractBuffer.h:31:
../../corecvs/core/buffers/memory/alignedMemoryBlock.h:22:17:
error: use of undeclared identifier 'aligned_alloc'
mData = aligned_alloc(align, ((size + align - 1) / align) * align);
^

3. Qmake could not find intel TBB library. However, it is located in usr directory as
   third-party dependency (path: "/usr/local/include/tbb/"). Possibly need to fix mac tbb config.

In file included from alignment/camerasCalibration/camerasCalibrationFunc.cpp:1:
In file included from ../../corecvs/core/alignment/camerasCalibration/camerasCalibrationFunc.h:2:
In file included from ../../corecvs/core/function/function.h:16:
In file included from ../../corecvs/core/math/matrix/matrix.h:17:
In file included from ../../corecvs/core/buffers/abstractBuffer.h:32:
../../corecvs/core/tbbwrapper/tbbWrapper.h:20:10: fatal error: 'tbb/parallel_for.h' file not found
#include <tbb/parallel_for.h>
^~~~~~~~~~~~~~~~~~~~

List of problems above not exhaustive. With this modifications currently I has been able to
compile coresvs/core lib without tests or cloudview.