Remove mention of status of current Zone implementation. Improve description of xsetname, xprint, xprintid, xfprint, xfprintid, xexec, and xfexec. Added method and doc tags that should exist to DefinedObject protocol. Minor changes to method spacing. Add a description.
All methods are factory methods.
Constify return of getDisplayName. Constify return of getName in GetName deftype. Constify argument to Symbol setName. Constify argument to Warning setMessageString. Constify return of Warning getMessageString.