operator: disparity to depth

components/operators/CMakeLists.txt

components/operators/include/ftl/operators/disparity.hpp

components/operators/src/disparity/cuda.hpp

components/operators/src/disparity/disp2depth.cu

components/operators/src/disparity/disparity_to_depth.cpp

components/operators/src/disparity/optflow_smoothing.cpp

components/operators/src/disparity/optflow_smoothing.cu

components/rgbd-sources/CMakeLists.txt

components/rgbd-sources/src/cuda_algorithms.hpp

...rgbd-sources/src/sources/middlebury/middlebury_source.cpp

...ents/rgbd-sources/src/sources/stereovideo/stereovideo.cpp