Added README.

Author: lucasconstantino

README.md

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+# Smart knobs addon for Storybook
+
+## Usage:
+
+```js
+import React, { PropTypes } from 'react'
+import { storiesOf } from '@kadira/storybook'
+import { withKnobs } from '@kadira/storybook-addon-knobs'
+import { withSmartKnobs } from 'storybook-addon-smart-knobs'
+
+const Button = ({ children, onClick }) => (
+  <button onClick={ onClick }>{ children }</button>
+)
+
+Button.propTypes = {
+  children: PropTypes.node,
+  onClick: PropTypes.func
+}
+
+storiesOf('Button')
+  .addDecorator(withSmartKnobs)
+  .addDecorator(withKnobs)
+  .add('simple', () => <Button>Smart knobed button</Button>)
+
+```