Added license statement to README

Author: rijnb

README

@@ -1,6 +1,19 @@
 -------------------------------------------------------------------------------
 MAPCODE JAVA LIBRARY
 -------------------------------------------------------------------------------
+Copyright (C) 2014 Stichting Mapcode Foundation (http://www.mapcode.com)
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
 
 Original C version created by Pieter Geelen. Work on Java version
 of the Mapcode library by Rijn Buve and Matthew Lowden.