[ROUTES] Allow accept-header specification during router creation

Router:
- Fix calls to connect, most of them were misusing the function's params

URLMapper:
- Minor fixes
- Documentation
- Add support for accept-header specification

Plugins/*:
- Fix calls to connect

plugins/SensitiveContent/SensitiveContentPlugin.php

@@ -49,7 +49,7 @@ class SensitiveContentPlugin extends Plugin
 	public function onRouterInitialized(URLMapper $m)
 	{
 		$m->connect('settings/sensitivecontent',
-			array('action' => 'sensitivecontentsettings'));
+                    ['action' => 'sensitivecontentsettings']);
 	}