update IGDomain.__init__() to initialize reference Bezier element facets
update IGDomain.__init__() to initialize reference Bezier element facets

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