Annotation built into dyShading

[lmeninato]

Do you think it would be useful to add a parameter to the dyShading() function to annotate why a region is being shaded? I am aware of dyAnnotation(), I just think it would be useful to build this into dyShading() as an optional parameter. I'm not great at js but I could look into adding it.

[lmeninato]

Would probably want to use a chart label placement algorithm