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

This reverts commit faaed60d7d6b69477f3c9ec879a1eeddacd1884b.

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