sonata-project/SonataAdminBundle — pull request #1003 by eko (2012-10-21 11:07:13+00:00)
Title: Add \DateTime fields display in list CRUD template

When trying to display a DateTime field in a list, I had the following error:

```
An exception has been thrown during the rendering of a template ("Catchable Fatal Error: Object of class DateTime could not be converted to string in /Users/vincent/dev/perso/frequence3/app/cache/dev/twig/d0/dd/b5d4f7105e7dee556992ae0c4e9a.php line 54") in "SonataAdminBundle:CRUD:list.html.twig".
```

So I have added a default format `Y-m-d H:i:s` in the `SonataAdminBundle` Twig extension.
I would have liked to use the SonataIntlBundle to fix it but it is declare as a "suggest" package in the `composer.json` file.

Let me know if there is a better way to fix it.

Thank you!