Add support of Symfony 3.0

Author: francoispluchino

composer.json

@@ -11,13 +11,13 @@
     }
   ],
   "require": {
-    "symfony/framework-bundle": "~2.1",
+    "symfony/framework-bundle": "~2.1|~3.0",
     "willdurand/geocoder": "~3.1",
-    "symfony/console": "~2.1"
+    "symfony/console": "~2.1|~3.0"
   },
   "require-dev": {
     "php": ">=5.4",
-    "symfony/yaml": "~2.1",
+    "symfony/yaml": "~2.1|~3.0",
     "maxromanovsky/php-maxmind-geoip": "~1.12",
     "doctrine/cache": "~1.3",
     "doctrine/orm": "~2.3"