Issue #58: Wrap ZnWebSocket stream iv by TransientValue, because GsSocket instances cannot be persisted
Issue #58: ZnSingleThreadedServer>>logServerError: to unconditionally log an error: and handleError: for GemStone so we make sure that all errors make it to the log (object log and continuation) AND the gem file .... add gobs of log helper methods to ZnGemServer ... control logging method and filter and whether or not continuations are created for errors from ZnGemServer