Added --version to cmd line tool

===========================

This section will document changes to the library since the last release

## Important

- Kinetic Protocol version updated to 3.0.0

## New features

- Added `--version` to cmd line tool

Changes from 0.7.2 to 0.7.3

===========================

import socket

import sys

import kinetic

from kinetic import client

from kinetic import PipelinedClient

preparser = argparse.ArgumentParser(add_help=False)

preparser.add_argument('-H', '--hostname', default='localhost')

preparser.add_argument('-P', '--port', type=int, default=8123)

preparser.add_argument('-v', '--verbose', action='count',

preparser.add_argument('-v', '--version', action='store_true',

                       help='Show kinetic version')

preparser.add_argument('-vb', '--verbose', action='count',

                       help='output more info (can stack)')

parser = argparse.ArgumentParser(parents=[preparser])

command_parsers = parser.add_subparsers()

    prompt = 'kinetic> '

    intro = """

    The Kinetic Drive Command Line Interface Tools

    The Kinetic Protocol Command Line Interface Tools

    type help for commands

    """

    def __init__(self, **options):

        cmd.Cmd.__init__(self)

        hostname = options.get('hostname', 'localhost')

        port = options.get('port', 8123)

        self.client = PipelinedClient(hostname, port)

        args = sys.argv[1:]

    preparse_args, extra_args = preparser.parse_known_args(args)

    configure_logging(preparse_args.verbose)

    if extra_args:

    if preparse_args.version:

        # print version and leave

        print 'kinetic library version "%s"' % kinetic.__version__

        print 'protocol version "%s"' % kinetic.protocol_version

        errorcode = 0

    elif extra_args:

        errorcode = handle_command(args)

    else:

        errorcode = handle_loop(**vars(preparse_args))