Added clients jobs lock.

#!/usr/bin/env python

#coding=utf8

from threading import RLock

from datetime import datetime

class CCClient(object):

        # The date of connection of the client:

        self._connection_date = datetime.now()

        # Jobs lock for this client:

        self.lock = RLock()

    def get_uptime(self):

        '''

        Get the uptime of the client connection in seconds.