RMS11 — We need to be able to add Annotations to RecordPart’s as well as ManagedRecords

Among other things, Annotations are used to tag ManagedRecord's with their security designations. There are situations in which only some RecordPart's are classified, therefore we need to be able to annotate RecordPart's separately. There was discussion of allowing Annotation's to Document's directly, but it was pointed out that there are situations in which a Document is not classified, but in the presence of another Document it is.