Kafka-influxdb

* Major rewrite which supports InfluxDB 0.9.1
* Supports custom encodings for all input and output formats
* Better error handling
* Updated documentation
* Add unit tests
* Add a license
* Update dependencies
* Add sample configurations for Collectd and InfluxDB
* Complete docker setup for easier testing
* Full changelog: https://github.com/mre/kafka-influxdb/compare/v0.3.0...v0.4.0

* Support Influxdb versions 0.8 and 0.9
* Support json format for incoming data
* Full changelog: https://github.com/mre/kafka-influxdb/compare/1f1810c57d61a193e10b9221d83ae14bb988cb57...v0.3.0