Add time command

#!/usr/bin/env python

#coding=utf8

'''

CloudControl time command

'''

import time as systime

import datetime

from cccli.exception import *

from sjrpc.core.exceptions import *

from cccli.printer import Printer, color

from cccli.command import Command

class Command_time(Command):

    '''Show execution time'''

    def __init__(self, cli, argv0):

        Command.__init__(self, cli, argv0)

    def __call__(self, argv):

        if len(argv) > 1:

            # Substitute aliases

            self.args = self.cli.aliases.substitute(argv[1:])

            # Init time

            t0 = systime.time()

            # Execute command

            self.cli.commands(self.args)

            t1 = systime.time()

            # Get elapsed time

            dt = int(t1 - t0)

            print "Execution time: %s" % datetime.timedelta(seconds=dt)