inbox and outbox for direct messages

Added an inbox and outbox for direct messages.

Factored common code to mailbox.php. Factored common code with
stream.php to personal.php.

darcs-hash:20080916195346-84dde-b5c846f713a970c41fd1b0671cb333e91f3cb920.gz

classes/Message.php

@@ -26,4 +26,12 @@ class Message extends DB_DataObject
 
     /* the code above is auto generated do not remove the tag below */
     ###END_AUTOCODE
+	
+	function getFrom() {
+		return Profile::staticGet('id', $this->from_profile);
+	}
+	
+	function getTo() {
+		return Profile::staticGet('id', $this->to_profile);
+	}
 }