Add dump command

Change-Id: If38d01ebb8788090f91a76daf6b7fc9add0320b7
diff --git a/tests/example-schema.yang b/tests/example-schema.yang
index fdd8daf..792ac42 100644
--- a/tests/example-schema.yang
+++ b/tests/example-schema.yang
@@ -264,4 +264,14 @@
             type string;
         }
     }
+
+    list point {
+        key "x y";
+        leaf x {
+            type int32;
+        }
+        leaf y {
+            type int32;
+        }
+    }
 }