Move GetConvOutDim to connection.{h,cc} to make it DRY
Move GetConvOutDim to connection.{h,cc} to make it DRY

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