Fixes #100

Updated README with gear syntax to run the examples. Some of the examples (SequenceFileIO and KafkaWordCount) need README's or an update to this README because it's not clear how to run them. 
How do you run SequenceFileIO? I did add fsio.conf which defines executor.extraClasspath. Let me know how to run SequenceFileIO by updating the README and I will run and possibly add a test case.