Behaviour of "nograph" option is not consistent

The reference manual says that with the "nograph" options, Dynare "doesn't do the graphs".

This options indeed prevents Dynare from displaying graphs, but it still creates PDF/EPS files in some parts of the code (but not all).

For example, stoch_simul+nograph won't create PDF/EPS files for IRFs, but estimation+nograph will still create some PDF/EPS files.

This is inconsistent. Moreover, some users would like to have the possibility of not saving the graphs (http://www.dynare.org/phpBB3/viewtopic.php?f=1&t=3362)

I think we should either decide that "nograph" means "do not display nor save graphs", or create a new option like "nographsave" which would allow full flexibility with regard to displaying/saving graphs.