update requested for new 'inputFormat' vs. depracated 'parser'

[StanDye]

It would be very helpful for me to see the same extension example "ExampleByteBufferInputRowParser" re-implemented using the newer inputFormat structure, along with the corresponding update to the json in the README.md. I have a very similar structure to implement, where an encoded byte-stream from Kafka contains json, which I would like to parse using a standard parsing / flattening configuration.