add arabic translation 

adds an arabic translation to launcher and game template
some strings still need translation (i copied from renpy6.16 ) i will edit them one by one as i finish the missing phrases.
note: launcher reads from left to right, so when choosing Arabic language for the launcher the words come out as garbled text -see image please-
![renpyar](https://cloud.githubusercontent.com/assets/6011019/2730703/99c019f4-c61e-11e3-8929-dd58719f70c3.jpg)