[DISCUSS] KIP-450: Sliding Windows

[Leah Thomas]

Hi all,
I'd like to kick-off the discussion for KIP-450, adding sliding window
aggregation support to Kafka Streams.

https://cwiki.apache.org/confluence/display/KAFKA/KIP-450%3A+Sliding+Window+Aggregations+in+the+DSL

Let me know what you think,
Leah