Add translations for OmniPrice module in French and Italian, and update upgrade scripts

- Added French translations for the OmniPrice module (fr.php).
- Added Italian translations for the OmniPrice module (it.php).
- Created empty Dutch translation file (nl.php).
- Implemented upgrade script for version 1.1.11 to update configuration for showing real discount.
- Implemented upgrade script for version 1.2.0 to update configuration for indexing inactive products.
- Implemented upgrade script for version 1.2.3 to update configuration for ignoring non-EU countries.

modules/gm_omniprice/controllers/front/index.php

@@ -0,0 +1,35 @@
+<?php
+/*
+* 2007-2014 PrestaShop
+*
+* NOTICE OF LICENSE
+*
+* This source file is subject to the Academic Free License (AFL 3.0)
+* that is bundled with this package in the file LICENSE.txt.
+* It is also available through the world-wide-web at this URL:
+* http://opensource.org/licenses/afl-3.0.php
+* If you did not receive a copy of the license and are unable to
+* obtain it through the world-wide-web, please send an email
+* to license@prestashop.com so we can send you a copy immediately.
+*
+* DISCLAIMER
+*
+* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
+* versions in the future. If you wish to customize PrestaShop for your
+* needs please refer to http://www.prestashop.com for more information.
+*
+*  @author PrestaShop SA <contact@prestashop.com>
+*  @copyright  2007-2014 PrestaShop SA
+*  @license    http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
+*  International Registered Trademark & Property of PrestaShop SA
+*/
+				    	
+header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
+header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
+						
+header("Cache-Control: no-store, no-cache, must-revalidate");
+header("Cache-Control: post-check=0, pre-check=0", false);
+header("Pragma: no-cache");
+						
+header("Location: ../");
+exit;