remove CMesh.from_mesh(), .get_from_cell_group(), .get_igs()
remove CMesh.from_mesh(), .get_from_cell_group(), .get_igs()

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