switched to browser router

Author: ajaymathur

website/src/app.js

@@ -1,6 +1,6 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
-import { HashRouter as Router, Route } from 'react-router-dom';
+import { BrowserRouter as Router, Route } from 'react-router-dom';
 import '@atlaskit/css-reset';
 
 import Header from './components/Header';