updated Doctrine version to 2.1.0

vendors.php

@@ -24,9 +24,9 @@ if (!is_dir($vendorDir = dirname(__FILE__).'/vendor')) {
 }
 
 $deps = array(
-    array('doctrine', 'http://github.com/doctrine/doctrine2.git', 'origin/HEAD'),
-    array('doctrine-dbal', 'http://github.com/doctrine/dbal.git', 'origin/HEAD'),
-    array('doctrine-common', 'http://github.com/doctrine/common.git', 'origin/HEAD'),
+    array('doctrine', 'http://github.com/doctrine/doctrine2.git', '2.1.0'),
+    array('doctrine-dbal', 'http://github.com/doctrine/dbal.git', '2.1.0'),
+    array('doctrine-common', 'http://github.com/doctrine/common.git', '2.1.0'),
     array('monolog', 'http://github.com/Seldaek/monolog.git', 'origin/HEAD'),
     array('swiftmailer', 'http://github.com/swiftmailer/swiftmailer.git', 'v4.1.0'),
     array('twig', 'http://github.com/fabpot/Twig.git', 'v1.1.0'),