BitMagic release v3.9.0

1. improved C++11 compatibility, added move constructors, assignmnets.
2. improved performance of bm::sparse_vector<> container, faster import and export
3. added libbm C library based on top of C++, but can be compiled without exceptions, RTTI, STL and C++ runtime dependency

BitMagic release v3.8.0

1. Fixed bug of incorrect buffer management on Windows/DLLs when bit-vectros are instantiated and used in different DLLs.
2. Changed buffer management for full blocks.
3. Improved doxygen markup and documentation.
4. Implemented new sparse container for integer types, based on bit-transposition.
   New container offers in-memory compression of non-random data based on bvector<>, dynamic adjustment of bitness, serialization and new algorithms.