SNESNEWTONTR: code improvements
support QN models
accepts Cauchy point if it is on the boundary
Enlarge trust region only if direction is on the boundary
Use previously estimated largest eigenval
SNESNEWTONTR: code improvements
support QN models
accepts Cauchy point if it is on the boundary
Enlarge trust region only if direction is on the boundary
Use previously estimated largest eigenvalue of hessian in minimum decrease
Customize trust region norm
Fix dogleg path computation
Update output files and add tests
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