Implements #331 adaptive SGM penalties

...onents/operators/include/ftl/operators/cuda/disparity.hpp

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

components/operators/src/depth.cpp

components/operators/src/disparity/disp2depth.cu

components/operators/src/disparity/fixstars_sgm.cpp

lib/libsgm/include/libsgm.h

lib/libsgm/src/check_consistency.cu

lib/libsgm/src/horizontal_path_aggregation.cu

lib/libsgm/src/horizontal_path_aggregation.hpp

lib/libsgm/src/internal.h

lib/libsgm/src/median_filter.cu

lib/libsgm/src/oblique_path_aggregation.cu

lib/libsgm/src/oblique_path_aggregation.hpp

lib/libsgm/src/path_aggregation.cu

lib/libsgm/src/path_aggregation.hpp

lib/libsgm/src/sgm.cu

lib/libsgm/src/sgm.hpp

lib/libsgm/src/stereo_sgm.cpp

lib/libsgm/src/vertical_path_aggregation.cu

lib/libsgm/src/vertical_path_aggregation.hpp