Implementing Reactive Streams based Spark Streaming Receiver

Hello TD,

This is probably the last bit of the back-pressure story, implementing ReactiveStreams based Spark streaming receivers. After discussing about this with my Typesafe team we came up with the following design document

https://docs.google.com/document/d/1lGQKXfNznd5SPuQigvCdLsudl-gcvWKuHWr0Bpn3y30/edit?usp=sharing

Could you please take a look at this when you get a chance?

Thanks
Nilanjan