Backed out the removal of the actual resize like implementation. Now, resizing by dimension is optional.
Backed out the removal of the actual resize like implementation. Now, resizing by dimension is optional.

madlib/eigen_backup,madlib/eigen_backup,rotorliu/eigen,mjbshaw/Eigen,rotorliu/eigen,mjbshaw/Eigen,rotorliu/eigen,mjbshaw/Eigen,mjbshaw/Eigen,madlib/eigen_backup,rotorliu/eigen,madlib/eigen_backup