update Variables.setup_dof_info(), improve DofInfo
update Variables.setup_dof_info(), improve DofInfo

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