adding an example for using PiOS algorithm for constructing pi-orbitals for active spaces
adding an example for using PiOS algorithm for constructing pi-orbitals for active spaces

gkc1000/pyscf,gkc1000/pyscf,sunqm/pyscf,gkc1000/pyscf,sunqm/pyscf,sunqm/pyscf,gkc1000/pyscf,sunqm/pyscf,gkc1000/pyscf