update Equations.create_matrix_graph() - any_dof_conn argument
update Equations.create_matrix_graph() - any_dof_conn argument

- update docstring

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