Fix typo in grammar.

Add lexertl.

inc/lexertl/size_t.hpp

@@ -0,0 +1,12 @@
+// size_t.h
+// Copyright (c) 2005-2012 Ben Hanson (http://www.benhanson.net/)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file licence_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef LEXERTL_SIZE_T_H
+#define LEXERTL_SIZE_T_H
+
+#include <stddef.h> // ptrdiff_t
+#include <cstring>
+
+#endif