2D nmr module and annotation

[lpatiny]

Would be nice to enable the annotations in the 2D nmr module

Currently seems it is an old code

        annotations: function(value) {
            value = DataTraversing.getValueIfNeeded(value);

            console.log(value);
            if(!value)
                return;

            this.annotations = value;
            this.resetAnnotations(true);
        }

The problem is that an annotation is linked to a serie. So we should be able to planeed annotations on 1D traces (top or left) or the 2D spectrum.