Pass children down to Checkboard

[BernardoFBBraga]

I'd like to use checkboard as a background for a button.

e.g.

<Checkboard>
        <button/>
</Checkboard>

This would be very simple if https://github.com/casesandberg/react-color/blob/master/src/components/common/Checkboard.js passed down the children prop to the div

Would that be ok?

[casesandberg]

Sure. Feel free to open up a PR with the change.

[Saumya29]

Can I take this? @casesandberg