Add support for a nil field for sub-view levels which request no fields.

In these cases, the nil field will write out a value to make the view be
present.  The objectId is implicitly available at read time in these cases.

Also fixed OOM in test code.  Further refactoring is needed.
Update ReservedFields to include TRACE correlation Id.
Update JsonEventConventions with additional optional fields.
Improve exception messaging on instanceId bindings to make diagnosis easier.
Further corrections for 'nil' field support.
Correct rapid stats logging.
Fix typos.
release 0.32
begin 0.33-SNAPSHOT
Merge remote-tracking branch 'jive/develop' into develop
Merge pull request #6 from mcumings/develop

Introduce the concept of nil field