Ajout du FR

Ajout du FR + correction du "functions.php"

vendor/symfony/polyfill-php55/README.md

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+Symfony Polyfill / Php55
+========================
+
+This component provides functions unavailable in releases prior to PHP 5.5:
+
+- [`boolval`](http://php.net/boolval)
+- [`json_last_error_msg`](http://php.net/json_last_error_msg)
+- [`array_column`](http://php.net/array_column)
+- [`hash_pbkdf2`](http://php.net/hash_pbkdf2)
+- `password_*` functions (from [ircmaxell/password_compat](https://github.com/ircmaxell/password_compat))
+
+More information can be found in the
+[main Polyfill README](https://github.com/symfony/polyfill/blob/master/README.md).
+
+License
+=======
+
+This library is released under the [MIT license](LICENSE).