Added license header

webapp/webapp.py

@@ -1,6 +1,22 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+r'''
+Created by Marcin Ulikowski <marcin@ulikowski.pl>
+
+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.
+'''
+
 import os
 from queue import Queue
 from uuid import uuid4