Added license headers to source

NOTICE

@@ -0,0 +1,2 @@
+grpc - Support for GRPC in Erlang
+Copyright 2017 Bluehouse Technology Ltd.

src/grpc.erl

@@ -1,3 +1,22 @@
+%%%-------------------------------------------------------------------
+%%% Licensed to the Apache Software Foundation (ASF) under one
+%%% or more contributor license agreements.  See the NOTICE file
+%%% distributed with this work for additional information
+%%% regarding copyright ownership.  The ASF licenses this file
+%%% to you 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.
+%%%
+
 %%
 %% @doc This is the interface for grpc.
 %%

src/grpc_app.erl

@@ -1,3 +1,22 @@
+%%%-------------------------------------------------------------------
+%%% Licensed to the Apache Software Foundation (ASF) under one
+%%% or more contributor license agreements.  See the NOTICE file
+%%% distributed with this work for additional information
+%%% regarding copyright ownership.  The ASF licenses this file
+%%% to you 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.
+%%%
+
 -module(grpc_app).
 -behaviour(application).
 

src/grpc_server.erl

@@ -1,3 +1,22 @@
+%%%-------------------------------------------------------------------
+%%% Licensed to the Apache Software Foundation (ASF) under one
+%%% or more contributor license agreements.  See the NOTICE file
+%%% distributed with this work for additional information
+%%% regarding copyright ownership.  The ASF licenses this file
+%%% to you 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.
+%%%
+
 %%% Implementation of the interface between the gRPC framework and the
 %%% Cowboy HTTP server.
 %%%

src/grpc_stream_handler.erl

@@ -1,3 +1,22 @@
+%%%-------------------------------------------------------------------
+%%% Licensed to the Apache Software Foundation (ASF) under one
+%%% or more contributor license agreements.  See the NOTICE file
+%%% distributed with this work for additional information
+%%% regarding copyright ownership.  The ASF licenses this file
+%%% to you 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.
+%%%
+
 %% @doc This cowboy stream handler takes care of flow control.
 %%
 %% It keeps track of the number of bytes received on a stream

src/grpc_sup.erl

@@ -1,3 +1,22 @@
+%%%-------------------------------------------------------------------
+%%% Licensed to the Apache Software Foundation (ASF) under one
+%%% or more contributor license agreements.  See the NOTICE file
+%%% distributed with this work for additional information
+%%% regarding copyright ownership.  The ASF licenses this file
+%%% to you 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.
+%%%
+
 -module(grpc_sup).
 -behaviour(supervisor).