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...