update SchroedingerApp.iterate() for new getvxc()
update SchroedingerApp.iterate() for new getvxc()

RexFuzzle/sfepy,lokik/sfepy,lokik/sfepy,sfepy/sfepy,BubuLK/sfepy,vlukes/sfepy,rc/sfepy,BubuLK/sfepy,lokik/sfepy,vlukes/sfepy,RexFuzzle/sfepy,RexFuzzle/sfepy,lokik/sfepy,sfepy/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,sfepy/sfepy,rc/sfepy,rc/sfepy,vlukes/sfepy