Tidy of components

- Moved all components into a single directory like nextjs
 - Made component names consistent with each other
 - Made component names consistent with their export class names
 - Added storybook for a few components with the aim to extend this further.

src/components/ModalSurvey.jsx

@@ -0,0 +1,38 @@
+import React from 'react'
+import PropTypes from 'prop-types'
+
+import Button from './Button'
+import Modal from './Modal'
+
+import logoImage from 'maputnik-design/logos/logo-color.svg'
+
+export default class ModalSurvey extends React.Component {
+  static propTypes = {
+    isOpen: PropTypes.bool.isRequired,
+    onOpenToggle: PropTypes.func.isRequired,
+  }
+
+  onClick = () => {
+    window.open('https://gregorywolanski.typeform.com/to/cPgaSY', '_blank');
+
+    this.props.onOpenToggle();
+  }
+
+  render() {
+    return <Modal
+      data-wd-key="modal:survey"
+      isOpen={this.props.isOpen}
+      onOpenToggle={this.props.onOpenToggle}
+      title="Maputnik Survey"
+    >
+      <div className="maputnik-modal-survey">
+        <div className="maputnik-modal-survey__logo" dangerouslySetInnerHTML={{__html: logoImage}} />
+        <h1>You + Maputnik = Maputnik better for you</h1>
+        <p className="maputnik-modal-survey__description">We don’t track you, so we don’t know how you use Maputnik. Help us make Maputnik better for you by completing a 7–minute survey carried out by our contributing designer.</p>
+        <Button onClick={this.onClick} className="maputnik-big-button maputnik-white-button maputnik-wide-button">Take the Maputnik Survey</Button>
+        <p className="maputnik-modal-survey__footnote">It takes 7 minutes, tops! Every question is optional.</p>
+      </div>
+    </Modal>
+  }
+}
+