Introduce GPW_FILE_VERSION integer
Document changes in gpaw.io module docstring. Use the name "values" in both fd and pw mode. Fixes problem in "gpaw gpw --remove-wave-functions xxx.gpw" command
Document changes in gpaw.io module docstring. Use the name "values" in both fd and pw mode. Fixes problem in "gpaw gpw --remove-wave-functions xxx.gpw" command