Implements #320 16 bit normals

applications/gui/src/camera.cpp

components/common/cpp/include/ftl/cuda_buffer.hpp

components/common/cpp/include/ftl/cuda_common.hpp

components/common/cpp/include/ftl/cuda_half.hpp

components/common/cpp/include/ftl/cuda_texture.hpp

components/common/cpp/include/ftl/traits.hpp

components/common/cpp/src/cuda_common.cpp

components/operators/include/ftl/operators/mvmls.hpp

components/operators/include/ftl/operators/normals.hpp

components/operators/include/ftl/operators/smoothing.hpp

components/operators/src/correspondence.cu

components/operators/src/mls.cu

components/operators/src/mvmls.cpp

components/operators/src/mvmls_cuda.hpp

components/operators/src/normals.cpp

components/operators/src/smoothing.cpp

components/operators/src/smoothing_cuda.hpp

components/renderers/cpp/include/ftl/cuda/normals.hpp

components/renderers/cpp/include/ftl/cuda/weighting.hpp

components/renderers/cpp/src/CUDARender.cpp