renamed all other notebooks to have the correct indexing

added machine learning notebook

See merge request !4

added networks notebook and data

See merge request !5

changed images and added copyrights where applicable
added checker for pip version

Cleaned up notebooks based on feedback from pilot

See merge request !2

# Conflicts:
#   python-data-3-numpy.ipynb
#   python-data-5-pandas.ipynb

slimmmed down all of the material
split the regex part from the pandas notebook into its own seperate notebook

Updating local copy of devel to include new plotting notebook.

Plotting Notebook

See merge request !1

added missing datasets
made some new extra exercises

This reverts commit 72f7777a.