FileSource.py: update ArchiveFileIOError to be compatible with IOError so that built-in tracing provides proper logs
FileSource.py: update ArchiveFileIOError to be compatible
with IOError so that built-in tracing provides proper logs

sternshus/Arelle,sternshus/Arelle,sternshus/Arelle,sternshus/Arelle,sternshus/Arelle