Merge pull request #101 from ronanguilloux/patch-1

Validating section: +1 PHP library

README.md

 * [Upload](https://github.com/codeguy/Upload) - A library for handling file uploads and validation.
 * [DMS Filter](https://github.com/rdohms/DMS-Filter) - An annotation filtering library.
 * [MetaYaml](https://github.com/romaricdrigon/MetaYaml) - A schema validation library that supports YAML, JSON and XML.
+* [ISO-codes](https://github.com/ronanguilloux/IsoCodes) - A library for validating various ISO & ZIP codes (IBAN, SWIFT/BIC, BBAN, VAT, SSN, UKNIN)
 
 ## REST and API
 *Libraries and web tools for developing REST-ful APIs.*