Issue 482

Fix #482 (and tests). I added FBAV (13->16) and platforms ```iOS_A_8_1``` and ```iOS_C_8_1```

@asgrim  @mimmi20 I have question. Why iPhone platforms ```iOS_A_X``` are mentionned for iPad,iPod children in file facebook-app-4-on.json ?

I didn't add the platform ```iOS_A_8_1``` for iPad, iPod but I can do it if necessary...