temporary hack for jet.Iterator.hasNext property

* javabean property reading will be implemented later
* jet.Iterator will be converted to Islam

stdlib/src/jet/Iterator.java

@@ -1,6 +1,9 @@
 package jet;
 
+import jet.runtime.typeinfo.JetMethod;
+
 public interface Iterator<T> extends JetObject {
+    @JetMethod(kind = JetMethod.KIND_PROPERTY)
     boolean getHasNext();
     T next ();
 }