moved al logic related to managing client state into a new owa_client…

… class.

all php clients now derive from owa_client
cleaned up handlers by removing checks for inbound session/visitor id
ading missing queue_item entity
moved tracking methods from owa_caller to owa_client

log.php

@@ -31,14 +31,10 @@
  * @since		owa 1.0.0
  */
 
-$config = array();
-$config['delay_first_hit'] = false;
-
-$owa = new owa_php($config);
-
+ignore_user_abort(true);
+$owa = new owa_php();
 $owa->e->debug('Logging Event from Url...');
-
-// run controller or view and echo page content
+// log event
 echo $owa->logEventFromUrl();
 
 ?>