Revert "Revert "Revert "Revert "StateBase no longer use Eigen""""
Revert "Revert "Revert "Revert "StateBase no longer use Eigen""""

This reverts commit 885a8995a9a89319767f1a0976180d5ccde28726.

zhouyan/vSMC,zhouyan/vSMC,zhouyan/vSMC,zhouyan/vSMC