License Update

Update readme files and licensing slugs to properly reference GPLv2, the original open source license used by the pre-fork project.

readme.txt

@@ -5,6 +5,7 @@ Tags: document management, pdf, doc, archive
 Requires at least: 3.0
 Tested up to: 3.3
 Stable tag: 2.3.4
+License GPLv2
 
 Allows users to upload, manage, search, and download publications, documents, and similar content (PDF, Power-Point, etc.).
 
@@ -126,7 +127,7 @@ Upgrading from 1.1 or 1.1.1 to 2.0 will *not* automatically transfer your public
 
 == Licenses ==
 
-WP Publication Archive is licensed under the GNU General Public License, version 3 or, at your discretion, any later version.
+WP Publication Archive is licensed under the GNU General Public License, version 2.
 
 This system was based on the original wp-publications-archive plug-in published by Luis Lino and Siemens Networks, S.A. at http://code.google.com/p/wp-publications-archive/.
 

wp-publication-archive.php

@@ -6,15 +6,14 @@
 Version: 2.3.4
 Author: Eric Mann
 Author URI: http://eamann.com
-License: GPLv3
+License: GPLv2
 */
 
 /*  Copyright 2010-2011  Eric Mann, Jumping Duck Media
  *
  * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 3 or, at
- * your discretion, any later version, as published by the Free
- * Software Foundation.
+ * it under the terms of the GNU General Public License, version 2, as 
+ * published by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of