Updated text on TriggerQueue.

Author: nmcl

docs/manual.adoc

@@ -632,6 +632,9 @@ public  class  TriggerQueue
     public synchronized void triggerFirst () throws NoSuchElementException;
 
     public synchronized void triggerAll () throws NoSuchElementException; 
+    
+    protected synchronized void insert (SimulationEntity toAdd) throws SimulationException;
+    protected synchronized SimulationEntity remove () throws NoSuchElementException;
 };
 ----
 
@@ -641,6 +644,8 @@ public  class  TriggerQueue
 
 If the queue is not empty when it is garbage collected by the virtual machine then all remaining queue members will be triggered, and placed back onto the scheduler queue.
 
+Typically TriggerQueues are used by the Semaphore implementation. However, they are available to be used by the application developer if you use the insert() and remove() methods directly in derived classes.
+
 === Semaphores
 
 Application code can be protected from simulation processes through semaphores, which are instances of the Semaphore class.