[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/ClientSideShorten/ClientSideShortenPlugin.php

@@ -51,7 +51,8 @@ class ClientSideShortenPlugin extends Plugin
     function onRouterInitialized($m)
     {
         if (common_logged_in()) {
-            $m->connect('plugins/ClientSideShorten/shorten', array('action'=>'shorten'));
+            $m->connect('plugins/ClientSideShorten/shorten',
+                        ['action'=>'shorten']);
         }
     }