Add licence document and per-file headers

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
diff --git a/console-server.c b/console-server.c
index 392b4a1..29462cc 100644
--- a/console-server.c
+++ b/console-server.c
@@ -1,7 +1,19 @@
 /**
  * Console server process for OpenBMC
  *
- * Copyright © 2016 IBM Corporation <jk@ozlabs.org>
+ * Copyright © 2016 IBM Corporation
+ *
+ * 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.
  */
 
 #define _GNU_SOURCE