MOLGW version 2.C

What's new in version 2.C

Real-time TDDFT is made available
speed-up in the Hartree, Exchange and AO to MO transform
calculation of the generalized oscillator strengths (q-dependent) and linear-response stopping power
use of LIBXC through the C interface
compibility with the latest LIBINT versions restored
creation of a YAML output file gathers many information that can be easily processed via python
bug fixes

Post-processing is not performed if the SCF cycles are not converged within tolscf (save user CPU time when a job went wrong)
Keywords scalapack_nprow and scalapack_npcol have been eliminated
Keyword stopping triggers the linear-response stopping power calculation
Value postscf='real_time' triggers real-time TDDFT (RT-TDDFT)
New default value for postscf_diago_flavor='D'
OPENMP parallelisation effort is pursued
Bug fix of the output of the COHSEX energies (bug discovered by Arjan Berger)

LIBXC is now linked through the C interface. Therefore, LIBXC compilation does not need to be consistent with MOLGW compilation.
The latest version of LIBXC can be used. Preprocessing flag -DLIBXC4 is no longer needed.
Preprocessing option -DHAVE_MKL allows for the use of MKL extensions and in particular of DGEMMT.
Use of modern Fortran2008 syntax, such as c%re to obtain the real part of a complex number. Code imcompatible with older compilers (gfortran > 9.0 necessary)

The list of all the input variables is now stored in a YAML file ~molgw/src/input_variables.yaml that is processed with the python script ~molgw/utils/input_variables.py