Added trash feature: Remove or revert a node.

Added Handler to show the current trash nodes for a given user.
An admin can see all the trash nodes.
Updated storage to handle trash and revert nodes.

modules/node/cms_node_api.e

@@ -212,6 +212,14 @@ feature -- Access: Node
 			Result := node_storage.nodes
 		end
 
+
+	trash_nodes (a_user: CMS_USER): LIST [CMS_NODE]
+			-- List of nodes with status in {CMS_NODE_API}.trashed.
+			-- if the current user is admin, it will retrieve all the trashed nodes
+		do
+			Result := node_storage.trash_nodes (a_user.id)
+		end
+
 	recent_nodes (a_offset, a_rows: INTEGER): LIST [CMS_NODE]
 			-- List of the `a_rows' most recent nodes starting from  `a_offset'.
 		do
@@ -316,6 +324,21 @@ feature -- Change: Node
 			node_storage.update_node (a_node)
 		end
 
+	trash_node (a_node: CMS_NODE)
+			-- Trash node `a_node'.
+			--! remove the node from the storage.
+		do
+			node_storage.trash_node (a_node)
+		end
+
+
+	revert_node (a_node: CMS_NODE)
+			-- Revert node `a_node'.
+			-- From {CMS_NODE_API}.trashed to {CMS_NODE_API}.not_published.
+		do
+			node_storage.revert_node (a_node)
+		end
+
 
 feature -- Node status