Change license from BSD to GPLv3

See http://www.hardcoded.net/archive2014#2014-12-28 for context

cocoa/pe/AppDelegate.h

@@ -1,9 +1,9 @@
 /* 
 Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 
-This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 which should be included with this package. The terms are also available at 
-http://www.hardcoded.net/licenses/bsd_license
+http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 #import <Cocoa/Cocoa.h>

cocoa/pe/AppDelegate.m

@@ -1,9 +1,9 @@
 /* 
 Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 
-This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 which should be included with this package. The terms are also available at 
-http://www.hardcoded.net/licenses/bsd_license
+http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 #import "AppDelegate.h"

cocoa/pe/Consts.h

@@ -1,9 +1,9 @@
 /* 
 Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 
-This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 which should be included with this package. The terms are also available at 
-http://www.hardcoded.net/licenses/bsd_license
+http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 #import "../base/Consts.h"

cocoa/pe/DetailsPanel.h

@@ -1,9 +1,9 @@
 /* 
 Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 
-This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 which should be included with this package. The terms are also available at 
-http://www.hardcoded.net/licenses/bsd_license
+http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 #import <Cocoa/Cocoa.h>

cocoa/pe/DetailsPanel.m

@@ -1,9 +1,9 @@
 /* 
 Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 
-This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 which should be included with this package. The terms are also available at 
-http://www.hardcoded.net/licenses/bsd_license
+http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 #import "Utils.h"

cocoa/pe/DirectoryPanel.h

@@ -1,9 +1,9 @@
 /* 
 Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 
-This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 which should be included with this package. The terms are also available at 
-http://www.hardcoded.net/licenses/bsd_license
+http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 #import <Cocoa/Cocoa.h>

cocoa/pe/DirectoryPanel.m

@@ -1,9 +1,9 @@
 /* 
 Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 
-This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 which should be included with this package. The terms are also available at 
-http://www.hardcoded.net/licenses/bsd_license
+http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 #import "DirectoryPanel.h"

cocoa/pe/ResultWindow.h

@@ -1,9 +1,9 @@
 /* 
 Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 
-This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 which should be included with this package. The terms are also available at 
-http://www.hardcoded.net/licenses/bsd_license
+http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 #import <Cocoa/Cocoa.h>

cocoa/pe/ResultWindow.m

@@ -1,9 +1,9 @@
 /* 
 Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 
-This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 which should be included with this package. The terms are also available at 
-http://www.hardcoded.net/licenses/bsd_license
+http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 #import "ResultWindow.h"

cocoa/pe/dg_cocoa.py

@@ -1,8 +1,8 @@
 # Copyright 2015 Hardcoded Software (http://www.hardcoded.net)
 # 
-# This software is licensed under the "BSD" License as described in the "LICENSE" file, 
+# This software is licensed under the "GPLv3" License as described in the "LICENSE" file, 
 # which should be included with this package. The terms are also available at 
-# http://www.hardcoded.net/licenses/bsd_license
+# http://www.gnu.org/licenses/gpl-3.0.html
 
 from hscommon.trans import install_gettext_trans_under_cocoa
 install_gettext_trans_under_cocoa()