use argparse instead of optparse in extractor.py
use argparse instead of optparse in extractor.py

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