docs: add Lux to implementations

Author: zacharygolba

implementations/index.md

@@ -92,6 +92,7 @@ assembled to vet them.
 * [json-api-ify](https://github.com/kutlerskaggs/json-api-ify) serialize the **** out of your data. json api v1.0 complaint.
 * [simple-jsonapi](https://github.com/allistercsmith/simple-jsonapi) A node.js module for serializing objects to JSON API compliant documents. Very flexible whilst not caring about your choice of framework or database layer. Aims to cover the latest published version of the spec, which is currently 1.0.
 * [bookshelf-jsonapi-params](https://github.com/scoutforpets/bookshelf-jsonapi-params) automatically apply JSON API filtering, pagination, sparse fieldsets, includes, and sorting to your Bookshelf.js queries.
+* [Lux](https://github.com/postlight/lux) is a MVC style Node.js framework for building lightning fast JSON APIs.
 
 ### <a href="#server-libraries-ruby" id="server-libraries-ruby" class="headerlink"></a> Ruby