Added a feature to CCConf class to copy an account.

                conf['password'] = self._hash_password(password)

            self._set_conf(login, conf, create=True)

    @writer

    def copy_account(self, copy_login, login, password):

        '''

        Create a new account based on another.

        :param copy_login: the login of the account to copy.

        :param password: password of the new user

        :param role: the role of the new user

        :raise CCConf.AlreadyExistingAccount: if the login is already

        :raise CCConf.UnknownAccount: if the copy login doesn't exist

        '''

        conf_copy = self._get_conf(copy_login)

        self.create_account(login, conf_copy['role'], password)

        password = self._get_conf(login)['password']

        conf_copy['password'] = password

        self._set_conf(login, conf_copy)

    @writer

    def add_right(self, login, tql, method=None, target='allow', index=None):

        '''