add user message to setNumStates*

[wrightaprilm]

Pursuant to #86, explain behavior of the setNumStates* methods so users aren't caught off-guard.

[willpett]

I think a better place for this message is in the documentation for the member method. Unfortunately, help pages for member methods aren't very accessible right now, but that is a separate issue. I think displaying a message every time this method is used might get a bit cluttered.

[willpett]

Ok, until we get the help pages for member methods working, I think the warning is a good idea. I made it a little more brief (also using RBOUT), and I hope it's okay that I renamed your method to getNumStatesVector, since I think that's what you meant?

[wrightaprilm]

Can we leave the name as setNumStatesVector() for continuity between the two?

[willpett]

Well, it is a getter function not a setter. It doesn't modify the object. It just returns a new set of objects.