Changed all db constructors to newer syntax, made insert_id() function more convenient for postgres on pdo driver
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index 237a4fc..d7b63b9 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -78,7 +78,7 @@
 	 *
 	 * @param array
 	 */
-	function CI_DB_driver($params)
+	function __construct($params)
 	{
 		if (is_array($params))
 		{