kcat 1.7.0

kafkacat has been renamed to kcat to adhere to the Apache Software Foundation's (ASF) trademark policies.

• kafkacat is now called kcat.
• Add support for multibyte delimiters to -D and -K (#140, #280)
• Add support for -X partition.assignment.strategy=cooperative-sticky incremental rebalancing.
• High-level consumer -G now supports exit-on-eof -e option (#86)
• Avro consumer with -J will now emit key_schema_id and value_schema_id.

Upgrade considerations

• Please rename any kafkacat.conf config files to kcat.conf.
  The old path will continue to work for some time but a warning will be
  printed.
• Please rename any KAFKACAT_CONF environment variables to KCAT_CONF.
  The old environment variable will continue to work for some time but a
  warning will be printed.