Added write-all parameter to save command. If set to true, the

Added write-all parameter to save command.  If set to true, the
command will save *all* properties, rather than just those marked as
archivable.  This feature was requested by Tony Peden to make it
easier to write documentation on the properties, but it should also be
useful for debugging.  There is currently no default binding for the
command with the write-all parameter set to true.