Refactor migrations with $up & $down

system/migrations/36-settings.sql

@@ -0,0 +1,9 @@
+CREATE TABLE `myaac_settings`
+(
+	`id` int(11) NOT NULL AUTO_INCREMENT,
+	`name` VARCHAR(255) NOT NULL DEFAULT '',
+	`key` VARCHAR(255) NOT NULL DEFAULT '',
+	`value` TEXT NOT NULL,
+	PRIMARY KEY (`id`),
+	KEY `key` (`key`)
+) ENGINE=InnoDB DEFAULT CHARACTER SET=utf8;