Gave a more consistent behavior to the Value::isFoo methods. See
NEWS.txt for more details.
diff --git a/include/json/value.h b/include/json/value.h
index e3869e5..b013c9b 100644
--- a/include/json/value.h
+++ b/include/json/value.h
@@ -280,7 +280,9 @@
       bool isNull() const;
       bool isBool() const;
       bool isInt() const;
+      bool isInt64() const;
       bool isUInt() const;
+      bool isUInt64() const;
       bool isIntegral() const;
       bool isDouble() const;
       bool isNumeric() const;