Fix require path and readme

Author: shivammathur

README.md

@@ -50,7 +50,7 @@ All API responses are in `json` format.
 /index.php/cities/{countryName}
 ```
 
-### Host this
+### :cloud: Host this
 Here are the [Configuration Instructions](http://www.slimframework.com/docs/v3/start/web-servers.html) for if you want to host this.
 
 

public/index.php

@@ -1,6 +1,6 @@
 <?php
 
-require __DIR__.'\..\vendor\autoload.php';
+require __DIR__.'/../vendor/autoload.php';
 
 use Slim\App;