conbinando json con serialize

http://stackoverflow.com/questions/11338774/serialize-form-data-to-json
http://css-tricks.com/snippets/jquery/serialize-form-to-json/
http://jaydson.org/serializando-um-formulario-com-jquery
http://www.cerocreativo.cl/labs/codigos/y-asi-funciona-serialize-en-jquery/
http://stackoverflow.com/questions/22742329/what-is-the-difference-between-jquery-serialize-method-vs-json-stringify
http://geekswithblogs.net/rgupta/archive/2014/06/25/combining-jquery-form-serialize-and-json.stringify-when-doing-ajax-post.aspx