Verify pipeline patch

[PranY]

The verify_pipeline method covers the known edge-cases for the transforms pipeline. The design is to introduce an extensible framework to check future cases.

[review-notebook-app[bot]]

Check out this pull request on 

You'll be able to see Jupyter notebook diff and discuss changes. Powered by ReviewNB.

[scart97]

The tests are breaking because of a problem while exporting the code from the notebooks. Please follow the instructions to fix it:

• Install nbdev: pip install nbdev --upgrade
• Install the git hooks (only need to do once): nbdev_install_git_hooks
• Before each commit run the following commands:

  pip install nbdev --upgrade
  nbdev_clean_nbs
  nbdev_build_lib
  nbdev_build_docs

• Optionally run nbdev_test_nbs to test the code

  The instructions to contribute that are present on the repository at the moment are lacking, I will update them.

[mogwai]

The instructions to contribute that are present on the repository at the moment are lacking, I will update them.

Surely we ca add those the into the pre-commit hook?