= Scopes =

Support for nested scopes within a function body will be added.
This will require changes to front, model, dynamic, state layers.

== Changed to model layer ==

ScopeIF:
 * Collection<LocalVariableIF> variables();
 * ScopeIF parent();
 * Iterator<ScopeIF> children();
 * int numChildren();

ModelIF:
 * ScopeIF newScope(ScopeIF parentScope);
 * LocationIF newLocation(ScopeIF scope, ...);
 * methods to create locations need to specify scope instead of function

FunctionIF:
 * /* creating a function creates one scope automatically: */
 * ScopeIF outerScope();