STORM-365: Add support for Python 3 to the storm command

This patch makes the storm command work with both Python 2 and Python 3.
Remove redundant parentheses.
Fix the output of `storm help`.
STORM-213. Decouple In-Process ZooKeeper from LocalCluster.
Merge branch 'STORM-213-V1' of https://github.com/harshach/incubator-storm into STORM-213

STORM-213: Decouple In-Process ZooKeeper from LocalCluster.
UAdded STORM-213 to Changelog
Merge branch 'storm-command-python3' of https://github.com/mnogu/incubator-storm into STORM-365

STORM-365: Add support for Python 3 to storm command.
Added STORM-365 to Changelog
Merge remote-tracking branch 'community/master' into community-zk-assignments
Cleaned up and ready for pull.