gen_iga_patch.py: split main() into new gen_iga_patch(), add_args()
gen_iga_patch.py: split main() into new gen_iga_patch(), add_args()

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