DFT+U basis from states
Description
Add the possibility to construct a basis from states taken from a different calculation. The states are taken at the first k-point (Gamma usually). This can be used with the different flavoir of +U (empirical or ab initio).
News snippet
Add the possibility to construct a basis from states taken from a different calculation.
Checklist
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I have checked that my code follows the Octopus coding standards -
I have added tests for all the new features added in this request.
Edited by Nicolas Tancogne-Dejean