v0.2.0

Change Log

• The project is no longer hosted on bintray (which has been EOLd), and was moved to maven central.
• Added ProducerData class which allow defining manually producer channels in the docket (see https://github.com/springwolf/springwolf-kafka#configuration-class for example). Thanks to @themis-pyrgiotis for contributing this addition!