Modified API of jobs cli handler method to use two booleans instead of one True/False/None.

        return errs.get_dict()

    @listed

    def jobs(self, conn, done=None):

    def jobs(self, conn, show_done=True, show_running=True):

        '''

        Return all jobs.

        :param done: if True, show only done jobs, False, only not done jobs,

            and None (default) to show all.

        :param show_done: show done jobs

        :param show_running: show running jobs

        '''

        props = ('id', 'status', 'created', 'ended',

                 'duration', 'done', 'author')

        jobs = []

        for job in self._server.jobs.iterjobs(done):

            jobs.append(job.export())

        for job in self._server.jobs.iterjobs(show_done, show_running):

            jobs.append(job.export(props))

        return jobs

        return {'objects': jobs, 'order': props}

    @listed

    def cancel(self, conn, jobid):

            if job['done']:

                del self._jobs[job['id']]

    def iterjobs(self, done=None):

    def iterjobs(self, show_done=True, show_running=True):

        '''

        Iter over jobs.

        '''

        for job in self._jobs.itervalues():

            if (done is None or job['done'] == done) and not job.get('_hidden'):

            if (show_done and job['done'] or show_running and not job['done']

                and not job.get('_hidden')):

                yield job