Merge branch 'feature/cppsdk' into 'master'

.gitmodules

CMakeLists.txt

SDK/C++/CMakeLists.txt

SDK/C++/private/feed_impl.cpp

SDK/C++/private/feed_impl.hpp

SDK/C++/private/frame_impl.cpp

SDK/C++/private/frame_impl.hpp

SDK/C++/private/image_impl.cpp

SDK/C++/private/image_impl.hpp

SDK/C++/private/observer_impl.cpp

SDK/C++/private/observer_impl.hpp

SDK/C++/private/pointcloud_impl.cpp

SDK/C++/private/pointcloud_impl.hpp

SDK/C++/private/room_impl.cpp

SDK/C++/private/room_impl.hpp

SDK/C++/private/system.cpp

SDK/C++/private/system_impl.hpp

SDK/C++/public/CMakeLists.txt

SDK/C++/public/ext/pybind11

SDK/C++/public/include/voltu/defines.hpp