Updated readme

README.md

@@ -29,6 +29,7 @@ The shoppingcart gives you the following methods to use:
 
 **Cart::add()**
 
+```php
 /**
  * Add a row to the cart
  * 
@@ -40,19 +41,38 @@ The shoppingcart gives you the following methods to use:
  */
 
 Cart::add('293ad', 'Product 1', 1, 9.99, array('size' => 'large'));
+```
+     
+**Cart::addBatch()**
+
+	/**
+     * Add multiple rows to the cart
+     * 
+     * @param Array $items An array of items to add, use array keys corresponding to the 'add' method's parameters
+     */
+     
+     Cart::addBatch(array(
+		array('id' => '293ad', 'name' => 'Product 1', 'qty' => 1, 'price' => 10.00),
+		array('id' => '4832k', 'name' => 'Product 2', 'qty' => 1, 'price' => 10.00, 'options' => array('size' => 'large'))     
+     ));
 
 **Cart::update()**
 
 	/**
      * Update the quantity of one row of the cart
+     * 
      * @param  string        $rowId       The rowid of the item you want to update
-     * @param  integer $qty   New quantity of the item
+     * @param  integer|Array $attribute   New quantity of the item|Array of attributes to update
      * @return boolean
      */
      $rowId = 'da39a3ee5e6b4b0d3255bfef95601890afd80709';
      
      Cart::update($rowId, 2);
      
+     OR
+     
+     Cart::update($rowId, array('name' => 'Product 1'));
+
 **Cart::remove()**
 	
 	/**