Replace Hardcoded Paths or Assign them to current directory

[deeptf]

The book and the repository are very useful Andriy, thanks for all your work.
I was reviewing this repo and at first sight, I felt some examples might not run due to hardcoded paths.

For example https://github.com/aburkov/theMLbook/blob/master/kmeans.py#L125
This directory might not be present.

We can probably assign an illustration directory within this repo.