Update deprecated repo

DEPRECATION NOTICE by author (vlucas)
==================
WORK ON THIS PROJECT HAS STOPPED. Please use Spot v2 instead - it is actively maintained, and is based on a more solid foundation in the Doctrine DBAL (database abstraction layer, not Doctrine ORM), and had much wider and mroe robust database support (MySQL, SQLite, PostgreSQL, SQLServer, Oracle, etc.).

README.md

 * [Propel](http://www.propelorm.org/) - A fast ORM, migration library and query builder.
 * [Eloquent](https://github.com/illuminate/database) - The Laravel 4 ORM.
 * [Baum](https://github.com/etrepat/baum) - A nested set implementation for Eloquent.
-* [Spot](https://github.com/vlucas/Spot) - A MySQL datamapper ORM.
+* [Spot2](https://github.com/vlucas/spot2) - A MySQL datamapper ORM.
 * [RedBean](http://redbeanphp.com/) - A lightweight, configuration-less ORM.
 * [PHP ActiveRecord](https://github.com/kla/php-activerecord) - A PHP Active Record implementation.
 * [Paris and Idiorm](http://j4mie.github.io/idiormandparis/) - A minimalist database library.