Bulk Operation

FLINK-2674 Key for Keyed State is not set upon Window Evaluation

FLINK-2674 Add support for accumulating/discarding for Event-Time Windows

FLINK-2674 Make State of General-Purpose Window Operators Fault-Tolerant

FLINK-2674 Add Fold Window Operation for new Windowing API

FLINK-2674 Add Windowed Join/CoGroup Operator Based on Tagged Union

FLINK-2674 Add javadocs/comments to new windowing mechanics

FLINK-2674 Remove Old Windowing Logic and API

FLINK-2674 Update documentation to reflect new Stream/Window API

FLINK-2674 Add API for non-parallel non-keyed Windows

FLINK-2674 Add new window API to streaming API

FLINK-2674 Add utilities for heap-backed keyed state in time panes

FLINK-2674 Add a dedicated processing time aligned keyed window operator

FLINK-2674 Create a dedicated aligned-event time window operator

FLINK-2674 Add a general-purpose keyed-window operator

FLINK-2674 Add abstraction for keyed window state

FLINK-2674 Add utilities for scheduled triggers

FLINK-2674 Rework DataStream API