- using _get_data_dir, not _get_config_dir in calendar's and similar
ensure_sources functions
- current executable version is stored in gconf, thus not every start is
migrating done
- applied changes which were using e_source_list_ensure_group calls
- e_source_list_sync is called at the end of those ensure_sources, as it
didn't work to me to see the Personal source after start when I had
no "On this computer" group (the group was added, but the source wasn't)