Fixes #100

SequenceIO and KafkaWordCount do not load related jars. Working on this.
Worker doesn't need to extend ArgumentsParser since it's options are never processed. I wanted to have all Apps look very similar - in this case uuid, id were redundant and options was never used, start was not needed. Although I wanted Worker to fit into the pattern of Starter, ArgumentsParser - Worker seems to be much simpler.