multi-camera calibration: all pieces working now

CMakeLists.txt

applications/calibration-multi/CMakeLists.txt

applications/calibration-multi/src/main.cpp

applications/calibration-multi/src/multicalibrate.cpp

applications/calibration-multi/src/multicalibrate.hpp

applications/calibration-multi/src/util.cpp

applications/calibration-multi/src/util.hpp

applications/calibration-multi/src/visibility.cpp

applications/calibration-multi/src/visibility.hpp

applications/calibration/src/lens.cpp

applications/calibration/src/stereo.cpp

applications/reconstruct/src/voxel_scene.cpp

applications/registration/src/aruco.cpp

components/rgbd-sources/src/cuda_algorithms.hpp

components/rgbd-sources/src/middlebury_source.cpp

components/rgbd-sources/src/net.cpp

components/rgbd-sources/src/stereovideo.cpp