enhance the qstat help and query, fix #17
enhance the qstat help and query, fix #17

- document nx/nnx options
- have a nice usage aligned print
- organized options
- use qstat standard option format for JSON protocol and version query
- add qstat standard option format for help query
- add standard version query

multiplay/qstat,multiplay/qstat,multiplay/qstat,multiplay/qstat,multiplay/qstat