Support for Node.js

Expected behavior

I was expecting this module to work on Node.js, am I wrong?

Actual behavior

It throws an error because of: FileReader is not defined

Steps to reproduce the behavior

Additional specs (e.g. browser, version, etc.)

[asturur]

The module is meant to run on browser but since the tests run under node, the module should too.

I think we can add an official.node method