update ProblemConf creation, control verbosity
update ProblemConf creation, control verbosity

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