Version 0.2.0

This package contains a Modern Fortran implementation of the Davidson diagonalization algorithms.
Different schemas are available to compute the correction.

Available correction methods are:

• DPR: Diagonal-Preconditioned-Residue
• GJD: Generalized Jacobi Davidson

Changed

• Improved variables names.
• Removed unnecessary ritz_vectors calculations.
• Optimized the DPR for the free version #34.
• Removed recomputation of the residues #34.