Generate plots of shortages for both piecewise and linear fit
	new file:   images/linear_shortage_frequency.pdf
	renamed:    images/shortage_frequency.pdf -> images/piecewise_shortage_frequency.pdf
	new file:   r/linear_shortage_pworst.csv
	new file:   r/piecewise_shortage_pworst.csv
	deleted:    r/shortages.csv
Correct linear shortage frequency plot, include text in document
Add calculations on worst-case probability, shortage, cost