Release 0.96.0

• Enhance WatchResponse to allow lazy event materialization
  • Old implementation read and created instances of Event for all events in the response
  • With large watch responses, this can contribute to memory usage spikes
  • The response now allows iterating events via generator, accessing events by index and determining
    number of events without the eager materialization
• Refactored Event and KVMetadata classes to not eagerly access fields from etcd response