better exception handling in Newton.__call__()
better exception handling in Newton.__call__()

- the original exception is raised in the first iteration

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