Iterable/Iterator in stdlib

stdlib/src/jet/Iterable$$Impl.java

@@ -0,0 +1,4 @@
+package jet;
+
+public abstract class Iterable$$Impl implements Iterable {
+}

stdlib/src/jet/Iterable.java

@@ -0,0 +1,5 @@
+package jet;
+
+public interface Iterable<T> extends JetObject {
+    Iterator<T> iterator ();
+}

stdlib/src/jet/Iterator$$Impl.java

@@ -0,0 +1,4 @@
+package jet;
+
+public abstract class Iterator$$Impl implements Iterator {
+}

stdlib/src/jet/Iterator.java

@@ -0,0 +1,6 @@
+package jet;
+
+public interface Iterator<T> extends JetObject {
+    boolean hasNext();
+    T next ();
+}