v0.2.3

• added GCP gcs support back in (was pending after switch from cluster to storage-based sync due to additional needs for delete / move)
• added endpoints for result summary generation / data retrieval / overview
• fixes (e.g issue of started but then stopped jobs under some circumstances being able to block claiming of new batches)
• diverse set of kolibri-watch UI changes
  • diverse uasbility fixes
  • visualization of result summary data
  • adjustments of single result visualizations