Make BFGS utility functions accessible.
Factor out BFGS::ApproximateEnergyChange.
Factor out BFGS::UpdateTrustRadius.
Add reference of GEDIIS.
Declaration of GEDIIS optimization class.
Scaffold for GEDIIS class.
Utilize GEDIIS optimization method.
Skeleton for GEDIISHistory class.
Factor out BFGS::RollbackMolecularGeometry.
Scaffold for GEDIIS class.
Factor out BFGS::CalcDisplacement.
Factor out BFGS::Storemoleculargeometry.
Scaffold for GEDIIS class.
Skeleton for GEDIISHistory class.
Use Blas::Dcopy in BFGS::SearchMinimum.