Lingering issues with making-the-best-of-the-worst.ipynb

[alessandrozocca]

making-the-best-of-the-worst.ipynb:

• instead of being a standalone file, this code should just become a 3rd variant inside the fractional-bim.ipynb, see also Lingering issues in fractional-bim.ipynb #10
• preamble cells are outdated, delete and replace with the new one
• no story nor accompanying text for both models (fraction and substraction, please copy it from the book (see Example 6)
• delete the function and rearrange the code as to define the Pyomo model directly
• the name of the concrete model should be different (maybe just use the current names of the function?)

[jckantor]

I redid the notebook to be more of a standalone example of max-min worst-case planning.