Update Index.html to include headers

<h3>Testing a fix for issue #1 bug Fix.</h3>
<b>Added:</b>
<p>header('content-type: application/json; charset=utf-8');</p>
<p>header("access-control-allow-origin: *");</p>
Fix Source: [Stackoverflow](http://stackoverflow.com/questions/21012385/error-in-chrome-only-xmlhttprequest-cannot-load-file-url-no-access-control-all)