Add minimal environment.yml for Conda
Add minimal environment.yml for Conda

This can be used with conda env create -f environment.yml

robertodr/xcfun,robertodr/xcfun,dftlibs/xcfun,dftlibs/xcfun,dftlibs/xcfun,dftlibs/xcfun,robertodr/xcfun,robertodr/xcfun