Pyscf

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* Bugfix
- GIAO contributions to the off diagonal part of NMR shielding tensor.
- Handle zero core electrons in ECP parser.
- Handle zero occupied orbitals in CCSD module.
- Handle 1-electron system in UHF.
- Fix orbital ordering in SCF canonicalization when point group symmetry is used.
- Fix the missing fov term in UCCSD intermediates.
- Fix pbc atomic grids for low dimensional system.
- Avoid negative hessian in second order SCF solver.
- Fix bug in fci solver when system has cylinder spatial symmetry
- Fix eval_rho for GGA functional for non-hermitian density matrix

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* Bugfix
- CCSD frozen core when using AO-driven algorithm
- DFT UKS orbital hessian
- PBC gamma-point UHF exxdiv=ewald correction
- KUHF get_bands function

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* Bugfix
- CISD output message for multiple roots
- UHF hessian function in the second order SCF solver
- Integer overflow in npdot
- Module import error in PBC second order SCF solver
- Update makefile due to the bugfix in libcint library

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* Added
- Quantum chemistry ECP for solid
- AO-direct RCCSD
- CI coefficients transformation for one-particle basis rotation
- CIAH second order SCF solver for PBC KRHF and KUHF methods
- CISD and CISD 1, 2-particle density matrices
- Selected-CI and Selected-CI 1, 2-particle density matrices
- Smearing for PBC mean-field calculation
- PBC density fitting
* Improved
- Performance of CCSD(T)
- Change the default kpts mesh (to always include gamma point)
- PBC repeated images used by lattice summation

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* Bugfix
- PBC 2e integrals for wrap-around k-points
- CI coefficients in GAMESS WFN format
- Input parser for Gaussian nuclear model
- Density fitting outcore module for user input auxiliary basis

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* Bugfix
- GTO normalization in molden file
- multi-threading dgemm