Renamed due to a conflict with a site of mine

Using github for authentication, I already had a github callback module. Renamed to /callback/github/hook to be a bit more verbose (and avoid the conflict)

bootstrap/modules/callback/github/hook.php

@@ -1,6 +1,6 @@
 <?php
 
-class callback_github extends Module
+class callback_github_hook extends Module
 {
 	public $method = 'POST';