Added helper functions to get uri path for a node, and other related resources.

Added description to cms content type.
Fixed initialization of node module to create test bed nodes.

library/model/src/content/cms_content_type.e

@@ -21,6 +21,11 @@ feature -- Access
 		deferred
 		end
 
+	description: detachable READABLE_STRING_32
+			-- Optional description
+		deferred
+		end
+
 feature -- Factory
 
 	new_node (a_partial_node: detachable CMS_NODE): CMS_NODE