Initial checkin of ITimezoneService consumer.   This consumer uses EDEF
(consumer.edef bundle) to trigger discovery of the ITimezoneService
remote service proxy instance.  The
org.eclipse.ecf.geonames.timezone.consumer Activator has very simple
ServiceTracker to get the ITimezoneService when the instance is
discovered (via RSA EDEF), and then calls the
ITimezoneService.getTimezone/2 method, which invokes the underlying
remote service.