Resolves #103 with integration refactor

applications/reconstruct/CMakeLists.txt

applications/reconstruct/include/ftl/scene_rep_hash_sdf.hpp

applications/reconstruct/include/ftl/voxel_scene.hpp

applications/reconstruct/src/compactors.cu

applications/reconstruct/src/compactors.hpp

applications/reconstruct/src/main.cpp

applications/reconstruct/src/ray_cast_sdf.cpp

applications/reconstruct/src/scene_rep_hash_sdf.cu

applications/reconstruct/src/virtual_source.cpp

applications/reconstruct/src/voxel_scene.cpp