test all codes in guides/functions
test all codes in guides/functions

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