Debug optimization step

[githubpsyche]

Example of correct output for iteration 1:

                                                        First-order 
 Iteration  Func-count       f(x)        Step-size       optimality
     0           1          1244.28                          3.08
     1           3          1243.81      0.0945997            8.5  
     2           5          1243.71        0.22861         0.0074  
     3           6          1243.71              1       0.000108  
     4           7          1243.71              1       1.88e-08  

Local minimum found.

Optimization completed because the size of the gradient is less than
the value of the optimality tolerance.

<stopping criteria details>
K>> hold_betas

hold_betas =

    0.0996    0.6545

[githubpsyche]

It's done!