Small fixes on code and docs
Nice finished version of round 4 analysis notebook.
Nice finished version of round 5 analysis notebook.
Missing imports.
Finished ipython notebook for round 5 part 2 (experiments with causes relation).
Small fixes in analysis rounds 4 and 5 part 1.
Small fix: compute and print true_positives average in strategies.
Merge branch '156-diagnoses-classifier-experiments' into develop