Added thirdparty: boost library

thirdparty/include/boost/date_time/posix_time/time_period.hpp

@@ -0,0 +1,29 @@
+#ifndef POSIX_TIME_PERIOD_HPP___
+#define POSIX_TIME_PERIOD_HPP___
+
+/* Copyright (c) 2002,2003 CrystalClear Software, Inc.
+ * Use, modification and distribution is subject to the 
+ * Boost Software License, Version 1.0. (See accompanying
+ * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ * Author: Jeff Garland 
+ * $Date$
+ */
+
+#include "boost/date_time/period.hpp"
+#include "boost/date_time/posix_time/posix_time_duration.hpp"
+#include "boost/date_time/posix_time/ptime.hpp"
+
+namespace boost {
+namespace posix_time {
+
+  //! Time period type
+  /*! \ingroup time_basics
+   */
+  typedef date_time::period<ptime, time_duration> time_period;
+
+
+} }//namespace posix_time
+
+
+#endif
+