If options_.SpectralDensity.trigger is specified, identification would
otherwise plot graphs in every MC step

Change of Field name to be consistent with manual

Fixed a bug for the non-Octave version where only the last active figure
was printed instead of the figure with the actual handle. Octave
eps-version still needs to be taken care of.

Add missing legend to sensitivity plot

reporting: @graph: accept dynDate ranges for shade and xrange and float lower/upper bound for yrange

Return zero if A and B have no common frequencies (previously an error was returned).