Further on nograph: moved printed output when advanced=1 from plot_identification to disp_identification.

Proper handling of nograph option in gsa routines. Accordingly some more printed output on command window is allowed.

(cherry picked from commit 32a14593)

(cherry picked from commit 335db3d8)

Consider the effective number of structural innovations in initial_estimation_checks routine. Some of the declared structural innovations may have been calibrated with a zero variance.

Removed NaNs in M_.Correlation_matrix if they are the consequence of variances (of structural innovations) calibrated to zero.

not present in initval or endval are set to zero.

variables. The preprocessor still needs to be modified to allow
arbitrary initial value of the Lagrange multipliers

cleaned up error messages related to priors; set error trap for
initilial likelihood Nan or complex

They trigger warnings under Octave

1) options_gsa passed as function argument
2) use pvalues always to trigger Smirnov plots and correlation plots;
3) eliminated density plots in rmse analysis;
4) updated tex documentation