Fix some typos
Fix some typos

jnishi/chainer,keisuke-umezawa/chainer,chainer/chainer,okuta/chainer,ronekko/chainer,jnishi/chainer,hvy/chainer,aonotas/chainer,wkentaro/chainer,jnishi/chainer,keisuke-umezawa/chainer,okuta/chainer,anaruse/chainer,kashif/chainer,niboshi/chainer,niboshi/chainer,keisuke-umezawa/chainer,hvy/chainer,niboshi/chainer,keisuke-umezawa/chainer,pfnet/chainer,chainer/chainer,hvy/chainer,chainer/chainer,chainer/chainer,wkentaro/chainer,ktnyt/chainer,tkerola/chainer,ktnyt/chainer,niboshi/chainer,rezoo/chainer,ktnyt/chainer,okuta/chainer,ktnyt/chainer,jnishi/chainer,wkentaro/chainer,wkentaro/chainer,okuta/chainer,hvy/chainer