Update README.md

Author: m-lopez-f

README.md

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 Laravel Prestashop Web Service
 ========
 
-Laravel 5 wrapper for Prestashop Web Service Library
+Laravel 5 wrapper for Prestashop Web Service Library, in this library it's possible that reponse of Prestashop web service containt json
 This a fork of https://github.com/Silentscripter/laravel-prestashop-webservice
 Author: https://github.com/Silentscripter