Separate Doctrine\UuidTupe into an external library

Closes #51

tests/bootstrap.php

@@ -1,5 +1,4 @@
 <?php
-
 error_reporting(E_ALL | E_STRICT);
 date_default_timezone_set('UTC');
 
@@ -9,11 +8,6 @@ if (!file_exists(dirname(__DIR__) . '/vendor/autoload.php')) {
         . "See http://getcomposer.org for help with installing composer\n");
 }
 
-// Set a default timezone for HHVM tests
-date_default_timezone_set('UTC');
-
 // Include the Composer autoloader
 $loader = include realpath(dirname(__FILE__) . '/../vendor/autoload.php');
-
-$loader->add("Doctrine\Tests\DBAL", __DIR__."/../vendor/doctrine/dbal/tests");
 $loader->addPsr4('Ramsey\\Uuid\\', __DIR__);