React versioning bug
I currently have React@15.1.0 installed and react-color@2.3.3 has installed react@15.3.2 despite listing react as a peer dependency. I then receive the following error in the console:

```
Uncaught Invariant Violation: addComponentAsRefTo(...): Only a ReactOwner can have refs. You might be adding a ref to a component that was not created inside a component's `render` method, or you have multiple copies of React loaded (details: https://fb.me/react-refs-must-have-owner).
```

If I then update my app to use react@15.3.2 the error goes away and the color picker works great (and relies on the peer dependency rather than installing it's own version of react). Ideally react-color would rely on the peer dependency without the upgrade.
