v2.0.0

• Now transpiled using Babel 6. If you are using CommonJS to require this library, you'll need to access the default property of the returned object. If using import, no change needed.
• Changed the argument received by the middleware factory to receive an options object. This object allows the previous argument isImmutable and now a new property ignore to allow to ignore certain slices of the state tree. (#25) Thanks a lot @darthrellimnad for your contribution!