Update enqueue-style.php

Switch order of app.css and style.css loading
Update functions.php

the function unregister_sidebar requires the sidebar to have an id
Merge pull request #253 from WPRanger/master

Update page-full.php
Merge pull request #254 from sebdufourcq/patch-2

Update enqueue-style.php
Merge pull request #255 from mcerrick/patch-1

Update functions.php