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.

stories/Button.stories.js

@@ -0,0 +1,18 @@
+import React from 'react';
+import Button from '../src/components/Button';
+import {action} from '@storybook/addon-actions';
+import {Wrapper} from './ui';
+
+export default {
+  title: 'Button',
+  component: Button,
+};
+
+export const Simple = () => (
+  <Wrapper>
+    <Button onClick={action('onClick')}>
+      Hello Button
+    </Button>
+  </Wrapper>
+);
+