Add an internal interface for Priroda code

[chrinide]

Hi developers,

It is possible to add an new internal interface for Priroda code

http://rad.chem.msu.ru/~laikov/p061019/

This is a very small and very compact but relatively very powerful QC code, especially for relativistic DFT calculation.

[hokru]

Hi, thanks for the suggestion. I don't know the code, but from an initial survey adding an interaction seems easily doable. I will look into it in the near future.