Add the standard copyright header to trader.svg

.gitattributes

@@ -2,6 +2,7 @@ Makefile.am			ident
 /configure.ac			ident
 /build-aux/bootstrap		ident
 /build-aux/msgfmt-desktop	ident
+/data/trader.svg		ident
 /doc/trader.*			ident
 /po/LINGUAS			ident
 /po/Makevars			ident

data/trader.svg

@@ -1,6 +1,4 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Star Traders icon -->
-<!-- Copyright (C) 2016, John Zaitseff -->
 <svg
     xmlns="http://www.w3.org/2000/svg"
     xmlns:xlink="http://www.w3.org/1999/xlink"
@@ -9,6 +7,33 @@
     height="512"
     viewBox="0 0 512 512"
     id="trader-icon">
+<!--
+*************************************************************************
+*                                                                       *
+*             Star Traders: A Game of Interstellar Trading              *
+*                Copyright (C) 1990-2017, John Zaitseff                 *
+*                                                                       *
+*************************************************************************
+
+Author: John Zaitseff <J.Zaitseff@zap.org.au>
+$Id$
+
+This file, trader.svg, contains the icon image for Star Traders.
+
+
+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/.
+-->
   <title>Star Traders icon</title>
 
   <defs>