Fix php warnings

plugins/awocoupon/awocoupon.script.php

@@ -53,7 +53,7 @@ class plgVmShipmentRulesAwoCouponInstallerScript
     public function install(JAdapterInstance $adapter)
     {
         // enabling plugin upon installation
-        $db =& JFactory::getDBO();
+        $db = JFactory::getDBO();
         $db->setQuery('update #__extensions set enabled = 1 where type = "plugin" and element = "'.$pluginname.'" and folder = "'.$plugintype.'"');
         $db->query();
         

plugins/regexp/regexp.script.php

@@ -49,7 +49,7 @@ class plgVmShipmentRulesRegexpInstallerScript
     public function install(JAdapterInstance $adapter)
     {
         // enabling plugin upon installation
-        $db =& JFactory::getDBO();
+        $db = JFactory::getDBO();
         $db->setQuery('update #__extensions set enabled = 1 where type = "plugin" and element = "regexp" and folder = "vmshipmentrules"');
         $db->query();
         

plugins/template/YOUR_PLUGIN_NAME.script.php

@@ -49,7 +49,7 @@ class plgVmShipmentRulesYOUR_PLUGIN_NAMEInstallerScript
     public function install(JAdapterInstance $adapter)
     {
         // enabling plugin upon installation
-        $db =& JFactory::getDBO();
+        $db = JFactory::getDBO();
         $db->setQuery('update #__extensions set enabled = 1 where type = "plugin" and element = "YOUR_PLUGIN_NAME" and folder = "vmshipmentrules"');
         $db->query();
         

rules_shipping.script.php

@@ -46,7 +46,7 @@ class plgVmShipmentRules_ShippingInstallerScript
     public function install(JAdapterInstance $adapter)
     {
         // enabling plugin
-        $db =& JFactory::getDBO();
+        $db = JFactory::getDBO();
         $db->setQuery('update #__extensions set enabled = 1 where type = "plugin" and element = "rules_shipping" and folder = "vmshipment"');
         $db->query();
         

rules_shipping_advanced.script.php

@@ -46,7 +46,7 @@ class plgVmShipmentRules_Shipping_AdvancedInstallerScript
     public function install(JAdapterInstance $adapter)
     {
         // enabling plugin
-        $db =& JFactory::getDBO();
+        $db = JFactory::getDBO();
         $db->setQuery('update #__extensions set enabled = 1 where type = "plugin" and element = "rules_shipping_advanced" and folder = "vmshipment"');
         $db->query();
         

rules_shipping_base.php

@@ -174,8 +174,6 @@ class plgVmShipmentRules_Shipping_Base extends vmPSPlugin {
 		$values['shipment_name'] = $this->renderPluginName ($method);
 		$values['rule_name'] = $method->rule_name;
 // 		$values['order_weight'] = $this->getOrderWeight ($cart, $method->weight_unit);
-// 		$values['order_articles'] = $this->getOrderArticles ($cart);
-// 		$values['order_products'] = $this->getOrderProducts ($cart);
 		$values['shipment_weight_unit'] = $method->weight_unit;
 		$values['shipment_cost'] = $method->cost;
 		$values['tax_id'] = $method->tax_id;