WIP: Nlcc
Description
A set of bugfixes for NLCC for specific (unusual) cases, such as MGGA or spinors. Also, the contribution to the forces from the NLCC is now computed.
News snippet
Improved support of nonlinear core correction
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