* Add persistent variable to avoid to constantly add the same folders to the path or to get the list of data requests

git-svn-id: https://spcsvn.epfl.ch/repos/TCV/gdat/trunk@6182 d63d8f72-b253-0410-a779-e742ad2e26cf

clean list of data_requests now automatic from gdat_machine.m, add volume_rho, rhotor, etc in gdat_aug, improve CEZ gui

git-svn-id: https://spcsvn.epfl.ch/repos/TCV/gdat/trunk@5488 d63d8f72-b253-0410-a779-e742ad2e26cf