add 0_1 geometry to geometry_data, new _get_grid_0_1()
add 0_1 geometry to geometry_data, new _get_grid_0_1()

- update GeometryElement.__init__(), .get_surface_entities()

rc/sfepy,BubuLK/sfepy,BubuLK/sfepy,vlukes/sfepy,sfepy/sfepy,rc/sfepy,vlukes/sfepy,BubuLK/sfepy,rc/sfepy,vlukes/sfepy,sfepy/sfepy,sfepy/sfepy