fix wording as some options are to provide write access to internal states
fix wording as some options are to provide write access to internal states

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