link to Symfony2 bundle added to readme.md
link to Symfony2 bundle added to readme.md

richardwyke/PHP-Vars-To-Js-Transformer,loshmis/PHP-Vars-To-Js-Transformer,lotestudio/PHP-Vars-To-Js-Transformer,Stayallive/PHP-Vars-To-Js-Transformer,SelimSalihovic/PHP-Vars-To-Js-Transformer,laracasts/PHP-Vars-To-Js-Transformer