Resumable.js handler

Resumable.js is a JavaScript library providing multiple simultaneous, stable and resumable uploads via the HTML5 File API.

- [Official website](http://www.resumablejs.com)
- [Official GitHub repository](https://github.com/23/resumable.js)
- [Server side documentation](https://github.com/23/resumable.js#how-do-i-set-it-up-with-my-server)