replaced .tostr() by str()
replaced .tostr() by str()

olivierverdier/sfepy,sfepy/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,olivierverdier/sfepy,olivierverdier/sfepy,rc/sfepy,lokik/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,vlukes/sfepy,RexFuzzle/sfepy,lokik/sfepy,vlukes/sfepy,vlukes/sfepy,lokik/sfepy,rc/sfepy,rc/sfepy,sfepy/sfepy,BubuLK/sfepy,lokik/sfepy,sfepy/sfepy