list grup

List group
Usage : /list group
========
if '/list' in msg:
    client.refreshGroups()
    arg = msg.split(' ')
    if sender.id in myfriend:
        if arg[1] == 'group':
            listG = []
            gr = client.groups
            for x in range(len(gr)):
                listG.append(gr[x].name)
                pass
            listG.sort();
            jo = '\n[*] '.join(str(l) for l in listG)
        pengirim.sendMessage("[%s]\n %s" % (receiver.name, jo))
    else:
        pengirim.sendMessage("Mau lompat eaa")