fix ProblemConf.from_dict()
fix ProblemConf.from_dict()

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