Added GNU GPL License.

src/lishid/openinv/commands/ToggleOpenInvPluginCommand.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2011 lishid.  All rights reserved.
+ * 
+ * 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,  version 3.
+ * 
+ * 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/>.
+ */
+
 package lishid.openinv.commands;
 
 import lishid.openinv.OpenInv;