Step header and content components with which to make a multi step form

Usage:
-------------

``javascript
import { Step, Steps, StepHeader } from 'fl-react-steps'

// Check client/style.scss for variables you can override
import 'fl-react-steps/client/style.scss'

export default class SteppedForm extends React.Component {

constructor() {
super()
this.state = {step: 1}
}

handleChangeStep = step => {
this.setState({step})
}

render() {
const { step } = this.state

return (


`


StepHeader props:
-----------------
`
step: The currenly active step
headings: A list of titles for your steps
onChangeStep: Called when a step is clicked
className: Classes to give the step header wrapper node. Defaults to 'step-header clearfix'
stepClassName: Extra classes to give the individual header nodes
stepClass: Alias of stepClassName
`

Steps props:
------------
`
step: The currenly active step
``