microsoft compiler support

MSVC/.gitignore

MSVC/opendht.sln

MSVC/opendht.vcxproj

MSVC/opendht_deps.sln

MSVC/project_get_dependencies.bat

include/opendht/callbacks.h

include/opendht/crypto.h

include/opendht/dht.h

include/opendht/dhtrunner.h

include/opendht/infohash.h

include/opendht/node.h

include/opendht/request.h

include/opendht/rng.h

include/opendht/utils.h

include/opendht/value.h

src/crypto.cpp

src/default_types.cpp

src/dht.cpp

src/dhtrunner.cpp

src/infohash.cpp