Resolve #135 with principal surface splats

applications/reconstruct/CMakeLists.txt

applications/reconstruct/include/ftl/cuda_operators.hpp

applications/reconstruct/src/depth_camera.cu

applications/reconstruct/src/depth_camera_cuda.hpp

applications/reconstruct/src/dibr.cu

applications/reconstruct/src/mls.cu

applications/reconstruct/src/mls_cuda.hpp

applications/reconstruct/src/splat_params.hpp

applications/reconstruct/src/splat_render.cpp

applications/reconstruct/src/splat_render.hpp

applications/reconstruct/src/splat_render_cuda.hpp

applications/reconstruct/src/voxel_hash.cpp

applications/reconstruct/src/voxel_render.cu

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