add custom norms to RadialMesh
add custom norms to RadialMesh

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