Issue a warning if conditional forecasts are computed with correlated innovations (if these correlations are defined in the covariance matrix of the innovations).
Changed fourth remark added by Johannes in commit e7727ba2d3365cf5269ab718cfbed86c82243cbe.
Added the possibility to declare non linear prior restrictions over estimated parameters.

If a file <MOD_FILE_NAME>_prior_restrictions.m exists in current folder, the value returned by this routine is
substracted to fval (likelihood-lnprior) at the end of dsge_likelihood. The arguments of this routine are: M_,
oo_, options_, dataset_ and dataset_info. Routines for writing <MOD_FILE_NAME>_prior_restrictions.m will be
provided later.
Fix bug in dynare_identification.m that led to missing output and crashes if the initial parameterization was invalid

If the initial parameters did not solve, the code for displaying results and saving was not reached. The also led to later crashes with saving as the -append option was used and no file existed. If no valid draw can be found, the function exits in any case, so no additional check is needed.
Merge pull request #701 from JohannesPfeifer/ident_fix

Fix bug in dynare_identification.m that led to missing output and crashe...
reporting: switch to pgfplotstable, #672