Add license information to the project headers and COPYING instructions.

sia.c

@@ -1,3 +1,20 @@
+/*
+   SIA-HS Alarm Monitoring Service
+   Copyright (C) Wilco Baan Hofman <wilco@baanhofman.nl> 2012
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
 #include <stdio.h>
 #include <stdint.h>
 #include <string.h>