Added new AVM node type DeletedNode (aka, ghost, tombstone), a marker node for a

node that has been deleted in a version. This makes tree comparisons easier by
resolving the cases in which one wants to know whether a deletions is more or less 
recent than another version of a node.  Along the way got rid of DeletedChild and 
friends including a table in the schema, since DeletedNode takes on all the work
that it performed.
Deleted two illegally named files in Virgin content.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3748 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/DirectoryNode.java

@@ -61,9 +61,10 @@ public interface DirectoryNode extends AVMNode
 
     /**
      * Remove a child directly.  No copy is possible.
+     * @param lPath The lookup through which this node was reached.
      * @param name The name of the child to remove.
      */
-    public void removeChild(String name);
+    public void removeChild(Lookup lPath, String name);
 
     /**
      * Get a directory listing.