Merge pull request #128 from dunglas/patch-1

composer.json: add dependency to ext-gearman

composer.json

@@ -20,6 +20,7 @@
     ],
     "require": {
         "php": ">=5.3.3",
+        "ext-gearman": "*",
 
         "doctrine/doctrine-cache-bundle": "~1.0",
         "doctrine/common": "~2.2",