metaclay.core: implement reference semantics for ValueList.
metaclay.core: implement reference semantics for ValueList.

aep/clay,mario-campos/clay,iamrekcah/clay,jckarter/clay,aep/clay,aep/clay,iamrekcah/clay,jckarter/clay,mario-campos/clay,iamrekcah/clay,jckarter/clay,iamrekcah/clay,jckarter/clay,aep/clay,jckarter/clay,mario-campos/clay,aep/clay,iamrekcah/clay,mario-campos/clay,jckarter/clay,mario-campos/clay,aep/clay