sim3 → core Relation

File in g2o/examples/sim3	Includes file in g2o/core
optimize_sphere_by_sim3.cpp	block_solver.h
optimize_sphere_by_sim3.cpp	factory.h
optimize_sphere_by_sim3.cpp	optimization_algorithm_gauss_newton.h
optimize_sphere_by_sim3.cpp	optimization_algorithm_levenberg.h
optimize_sphere_by_sim3.cpp	robust_kernel_impl.h
optimize_sphere_by_sim3.cpp	solver.h
optimize_sphere_by_sim3.cpp	sparse_optimizer.h