add upgrade guide for get_device_from_array
add upgrade guide for get_device_from_array

chainer/chainer,keisuke-umezawa/chainer,ktnyt/chainer,chainer/chainer,jnishi/chainer,niboshi/chainer,keisuke-umezawa/chainer,hvy/chainer,ktnyt/chainer,okuta/chainer,wkentaro/chainer,keisuke-umezawa/chainer,niboshi/chainer,jnishi/chainer,hvy/chainer,pfnet/chainer,keisuke-umezawa/chainer,ktnyt/chainer,wkentaro/chainer,wkentaro/chainer,jnishi/chainer,ktnyt/chainer,okuta/chainer,niboshi/chainer,hvy/chainer,okuta/chainer,jnishi/chainer,niboshi/chainer,chainer/chainer,chainer/chainer,tkerola/chainer,hvy/chainer,okuta/chainer,wkentaro/chainer