Renamed get_multisite_tensor -> get_multisite_mpo or get_multisite_mps to tell the difference
Renamed get_multisite_tensor -> get_multisite_mpo or get_multisite_mps to tell the difference


Former-commit-id: 9123d9db9b1beb89036699fa373851fc4018042c
DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG,DavidAce/DMRG