added the modified licence

Author: hiraditya

LICENCE

@@ -0,0 +1,20 @@
+cpp2cxx is an open source software distributed under terms of the 
+Apache2.0 licence.
+
+Copyrights remain with the original copyright holders. 
+Use of this material is by permission and/or license.
+
+Copyright [2012] Aditya Kumar, Andrew Sutton, Bjarne Stroustrup
+
+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.
+