1. Improve help message.
2. Missing import sys.
1. Add info to HadoopJob (stdout, stderr, job_id).
2. Return of stdout and stderr in --execute and --execute_jar.
1. Modify --state option to add several queries.
1. Debug StaticDataset.
1. Modify --state option to take an optional argument and use "general" when not specified.
Merge branch 'master' of https://github.com/mliroz/hadoop_g5k