FlatButton is not in release 3.0 but the documentation still has it

[zhxnlai]

This snippet from the doc page seems out of date.

//Flat Buttons
<FlatButton label="Default" />
<FlatButton label="Primary" primary={true} />
<FlatButton label="Disabled" disabled={true} />

[hai-cea]

Thanks @zhxnlai - The docs site is now in sync with the current release.