added Indonesian translation markdown for some files

Hi Mas @ekajogja,

I have added Indonesian translation markdown for some files including: 
- mac, 
- troubleshooting, 
- upgrading, 
- mail index, 
- quickstart, 
- faq, 
- writing, and 
- a bit translation of index.html. 

I will add the rest tomorrow. So for a while, could you please review them. thanks :)

Cheers,
nurulishlah