Improved URL rewriting support

When this code was written, it did not include an internal URL mapper
and each page was loaded by a PHP script. The internal URL was a recent,
mostly unfinished addition.

Base URL is now supported:
 * for views, when they implement the BaseURLAware interface (a base
class that does what most views will do with that is provided -
BaseURLAwareView),
 * in the menu,
 * in form actions,
 * in boxes (for buttons, and for the contents if the inner view
implements BaseURLAware).

includes/core/view.inc.php

@@ -5,6 +5,29 @@ interface View
 	public function render( );
 }
 
+interface BaseURLAware
+{
+	public function setBaseURL( $baseURL );
+}
+
+abstract class BaseURLAwareView
+	implements View , BaseURLAware
+{
+	protected $base;
+
+	public function setBaseURL( $baseURL )
+	{
+		$this->base = $baseURL;
+	}
+}
+
+interface TitleProvider
+{
+
+	public function getTitle( );
+
+}
+
 
 final class HTML
 {