[Serializer] Name Converter

| Q                | A
| --------------- | ---
| Doc fix?      | no
| New docs? | yes symfony/symfony#13120
| Applies to   | 2.7

This is the documentation for the Serializer Name Converter feature.
We don't use an address in the docs, something like "426 Jordy Lodge, Cartwrightshire, SC 88120-6700" will do (just a random address generated by Faker)