A possible mistake about file path definition in ../p1ch8/1_convolution.ipynb

[Starballoon]

The CIFAR dataset was first introduced in Chapter 7 of the book. And in the code examples of Chapter 7, CIFAR dataset was downloaded in default file path '../data-unversioned/p1ch7/'. Then in the code examples of Chapter 8, the default file path is '../data-unversioned/p1ch6/' which might cause the second download process. I guess it was alright in the preview version of the book.