[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/BitlyUrl/BitlyUrlPlugin.php

@@ -169,7 +169,7 @@ class BitlyUrlPlugin extends UrlShortenerPlugin
     public function onRouterInitialized(URLMapper $m)
     {
         $m->connect('panel/bitly',
-                    array('action' => 'bitlyadminpanel'));
+                    ['action' => 'bitlyadminpanel']);
         return true;
     }