RMS — Documents shared among CaseFile's and "vanilla" ManagedRecord's

A document can be shared among multiple ManagedRecord's. The sharing is predicated on the immutability of a Document. CaseFilePart's are permitted to be appendable, deleteable, etc... all modifications of the Document. If a Document is shared among these MR's, constraints must be put on the characteristics of the CaseFilePart to assure to assure the integrity of the Document in the context of the vanilla ManagedRecord.

In examining this seemingly "innocuous" issue, it became clear that our model was somewhat "upside-down". To resolve it, the CaseFile package will be eliminated and the concepts merged into ManagedRecord. Essentially a ManagedRecord is a CaseFile with immutable parts.