New docid functions
Users need to be able to ask metacat what the latest revision number for a document is. We currently have the getLastId function which returns the last used id number for a scope. We also need to be able to find the last used revision for a scope and an object number. For instance, if I sent in doc.1.1 and the last id used was doc.1.3, the function should return 4.
Both of these functions need to be exposed via the ecogrid-identifier EcoGrid interface.