Fix typo in grammar.

Add lexertl.

inc/lexertl/bool.hpp

@@ -0,0 +1,22 @@
+// bool.hpp
+// Copyright (c) 2010-2012 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_BOOL_H
+#define LEXERTL_BOOL_H
+
+namespace lexertl
+{
+// Named template param for compiler compatibility
+template<bool b>
+struct bool_
+{
+};
+
+typedef bool_<true> true_;
+typedef bool_<false> false_;
+}
+
+#endif