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.

.storybook/manager.js

@@ -0,0 +1,7 @@
+import { addons } from '@storybook/addons';
+import { themes } from '@storybook/theming';
+import theme from './maputnik.theme';
+
+addons.setConfig({
+  theme: theme,
+});