Updates scheme rule-helpers for r2l questions; a few bugs remain. . .

@AmeBel @ruiting @linas @bgoertzel 
shouldn't `(InheritanceLink (ConceptNode obj_instance df-node-stv) (VariableNode "$qVar") df-link-stv)` be `(InheritanceLink (VariableNode "$qVar")  (ConceptNode obj_instance df-node-stv) df-link-stv)`
and
```
	(EvaluationLink df-link-stv (PredicateNode verb_instance df-node-stv)
		(ListlInk df-link-stv
			(ConceptNode subj_instance df-node-stv)
			(VariableNode "$qvar" df-node-stv)))
```
?