Add COPYING file (GPLv3).

Add copyright and license in file headers.

Author: jonls

COPYING

@@ -1,5 +1,21 @@
-/* colortemp.c */
-/* Copyright (c) 2009, Jon Lund Steffensen <[email protected]> */
+/* colortemp.c -- X color temperature adjustment source
+   This file is part of Redshift.
+
+   Redshift 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.
+
+   Redshift 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 Redshift.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copyright (c) 2009  Jon Lund Steffensen <[email protected]>
+*/
 
 #include <stdio.h>
 #include <stdlib.h>

colortemp.c

@@ -1,4 +1,21 @@
-/* colortemp.h */
+/* colortemp.h -- X color temperature adjustment header
+   This file is part of Redshift.
+
+   Redshift 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.
+
+   Redshift 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 Redshift.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copyright (c) 2009  Jon Lund Steffensen <[email protected]>
+*/
 
 #ifndef _COLORTEMP_H
 #define _COLORTEMP_H

colortemp.h

@@ -1,5 +1,21 @@
-/* redshift.c */
-/* Copyright (c) 2009, Jon Lund Steffensen <[email protected]> */
+/* redshift.c -- Main program source
+   This file is part of Redshift.
+
+   Redshift 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.
+
+   Redshift 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 Redshift.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copyright (c) 2009  Jon Lund Steffensen <[email protected]>
+*/
 
 #include <stdio.h>
 #include <stdlib.h>

redshift.c

@@ -1,5 +1,21 @@
-/* solar.c */
-/* Copyright (c) 2009, Jon Lund Steffensen <[email protected]> */
+/* solar.c -- Solar position source
+   This file is part of Redshift.
+
+   Redshift 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.
+
+   Redshift 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 Redshift.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copyright (c) 2009  Jon Lund Steffensen <[email protected]>
+*/
 
 /* Ported from javascript code by U.S. Department of Commerce,
    National Oceanic & Atmospheric Administration:

solar.c

@@ -1,4 +1,21 @@
-/* solar.h */
+/* solar.h -- Solar position header
+   This file is part of Redshift.
+
+   Redshift 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.
+
+   Redshift 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 Redshift.  If not, see <http://www.gnu.org/licenses/>.
+
+   Copyright (c) 2009  Jon Lund Steffensen <[email protected]>
+*/
 
 #ifndef _SOLAR_H
 #define _SOLAR_H