ActionML version of PredictionIO v0.9.6

This release has these changes

• New SelfCleaningDatasource allows any template to add:
  • A moving time window of events, old ones beyond the timeWindow will age out of the persisted EventStore
  • De-duplication of events
  • Compaction of property change events
• Implements NullModel for templates that have custom model storage. This includes the Universal Recommender, which uses Elasticsearch.
• Removes the need for a Spark context when running the PredictionServer for templates that do not need it.
• Workflow cleanup