Added "hub page" package

This package provides the HubPage class which can be used to create
pages that act as URL mappers.

includes/hub-page/hub-page.inc.php

@@ -0,0 +1,45 @@
+<?php
+
+abstract class HubPage
+	extends HTMLPage
+	implements PathAware
+{
+	private static $pages;
+
+	public function __construct( $pages )
+	{
+		parent::__construct( );
+		$this->pages = $pages;
+	}
+
+
+	public function setExtraPath( $extraPath )
+	{
+		if ( !is_array( $this->pages ) || ! array_key_exists( $extraPath , $this->pages ) ) {
+			return false;
+		}
+
+		$handler = $this->pages[ $extraPath ];
+		if ( ! is_array( $handler ) ) {
+			$handler = array( $handler );
+		}
+
+		try {
+			$toAdd = Loader::DirectCreate( 'ctrl' , true , $handler );
+			$this->addController( $toAdd );
+		} catch ( LoaderException $e ) {
+			try {
+				$toAdd = Loader::DirectCreate( 'view' , true , $handler );
+				$this->addView( $toAdd );
+			} catch ( LoaderException $e ) {
+				return false;
+			}
+		}
+
+		if ( $toAdd instanceof TitleProvider ) {
+			$this->setTitle( $toAdd->getTitle( ) );
+		}
+
+		return true;
+	}
+}

includes/hub-page/package.inc.php

@@ -0,0 +1,4 @@
+<?
+
+$package[ 'files' ][] = 'hub-page';
+$package[ 'extras' ][] = 'HubPage';