0.8.4 versioning

librdkafka Debian release 0.8.3-1

Version 0.8.3

Proper librdkafka.a dependency for examples

Added rd_kafka_version() and rd_kafka_version_str()

This is needed for runtime acquisition of the version when linking dynamically.

librdkafka Debian release 0.8.0-1

Updated README with statistics info and node-kafka

Clarified the use of 'payload' in rd_kafka_produce() and who is respo…

…nsible for freeing the data