version 5.4.0

remove CORS default header from PIHTTPServer
fix several docs
fix PIMathVector::dot return type
add units directory with PIUnits facility

libs/main/units/piunits_class_distance.h

@@ -0,0 +1,38 @@
+/*! \file piunits_class_distance.h
+ * \ingroup Core
+ * \~\brief
+ * \~english Distance units
+ * \~russian Единицы измерения расстояния
+ */
+/*
+    PIP - Platform Independent Primitives
+    Distance units
+    Ivan Pelipenko peri4ko@yandex.ru
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef PIUNITS_CLASS_DISTANCE_H
+#define PIUNITS_CLASS_DISTANCE_H
+
+#include "piunits_base.h"
+
+DECLARE_UNIT_CLASS_BEGIN(Distance, 0x600)
+	enum {
+		Meter = typeStart,
+		_LastType,
+	};
+DECLARE_UNIT_CLASS_END(Distance)
+
+#endif