new .locked attribute of Variable, update .set_data()
new .locked attribute of Variable, update .set_data()

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