Initial framework for Bucket Reducers
Aggregations explicitly return List of buckets instead of Collection
More framework
Buckets now do their own serialization so can be serialised outside of aggregations
Added context for BucketStreams to allow arbitrary attributes to be passed to buckets on deserialisation
started trying to implement sliding window reducer
trying to integrate bucket stream context into reducer framework
More wiring for the reducer phase
adds sliding window parser to ReducerModule
reducers now plumbed into the search process
Very primitive version of sliding window bucket reducer working in search request
changed the request parameter to be in line with API defined by Clinton
Better key for the sliding window reducer
Can now nest reducers inside a reducer
minor clean up of bucket reducers code
started implementing the delta metric reducer
Transport/ Java API: Fix result transport and add api methods
draft for lin regression