Merge branch '2.3' into 2.4

* 2.3:
  Fixed version for composer install

Author: weaverryan

quick_tour/the_big_picture.rst

@@ -20,7 +20,7 @@ directory:
 
 .. code-block:: bash
 
-    $ composer create-project symfony/framework-standard-edition myproject/ '~2.4'
+    $ composer create-project symfony/framework-standard-edition myproject/ '~2.3'
 
 .. note::