Improve unit testing of real-word sparse problem (fix some shortcommings, use VERIFY, etc.)
Improve unit testing of real-word sparse problem (fix some shortcommings, use VERIFY, etc.)

madlib/eigen_backup,rotorliu/eigen,madlib/eigen_backup,madlib/eigen_backup,rotorliu/eigen,rotorliu/eigen,madlib/eigen_backup,rotorliu/eigen