clean up sfepy/fem/problemDef.py
clean up sfepy/fem/problemDef.py

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