Added the cereal serialisation library to 3rdparty/

3rdparty/cereal-1.1.1/LICENSE

3rdparty/cereal-1.1.1/README.md

3rdparty/cereal-1.1.1/include/cereal/access.hpp

3rdparty/cereal-1.1.1/include/cereal/archives/adapters.hpp

3rdparty/cereal-1.1.1/include/cereal/archives/binary.hpp

3rdparty/cereal-1.1.1/include/cereal/archives/json.hpp

.../cereal-1.1.1/include/cereal/archives/portable_binary.hpp

3rdparty/cereal-1.1.1/include/cereal/archives/xml.hpp

3rdparty/cereal-1.1.1/include/cereal/cereal.hpp

3rdparty/cereal-1.1.1/include/cereal/details/helpers.hpp

.../cereal-1.1.1/include/cereal/details/polymorphic_impl.hpp

...rty/cereal-1.1.1/include/cereal/details/static_object.hpp

3rdparty/cereal-1.1.1/include/cereal/details/traits.hpp

3rdparty/cereal-1.1.1/include/cereal/details/util.hpp

3rdparty/cereal-1.1.1/include/cereal/external/base64.hpp

...cereal-1.1.1/include/cereal/external/rapidjson/document.h

...real-1.1.1/include/cereal/external/rapidjson/filestream.h

...l-1.1.1/include/cereal/external/rapidjson/genericstream.h

...-1.1.1/include/cereal/external/rapidjson/internal/pow10.h

...-1.1.1/include/cereal/external/rapidjson/internal/stack.h