Fix to Roszman1's certified solution.
Extend nist.cc to test more nonlinear and linear solvers.

(Thanks to Markus Moll for finding the Roszman1 bug)

Change-Id: I92b4bab0771de85f7fe711fb0853f155991f4aaf
diff --git a/data/nist/Roszman1.dat b/data/nist/Roszman1.dat
index 0296837..1d67674 100644
--- a/data/nist/Roszman1.dat
+++ b/data/nist/Roszman1.dat
@@ -14,7 +14,7 @@
                predictor variable is the excited energy state.

                The argument to the ARCTAN function is in radians.

 

-Reference:     Roszman, L., NIST (19??).  

+Reference:     Roszman, L., NIST (19??).

                Quantum Defects for Sulfur I Atom.

 

 

@@ -38,7 +38,7 @@
           Starting Values                  Certified Values

 

         Start 1     Start 2           Parameter     Standard Deviation

-  b1 =      0.1         0.2         2.0196866396E-01  1.9172666023E-02

+  b1 =      0.1         0.2         1.20196866396E-0  1.9172666023E-02

   b2 =     -0.00001    -0.000005   -6.1953516256E-06  3.2058931691E-06

   b3 =   1000        1200           1.2044556708E+03  7.4050983057E+01

   b4 =   -100        -150          -1.8134269537E+02  4.9573513849E+01