Merge pull request #1 from johnoliver/master

add learning curve and correlation graphs
Merge pull request #2 from johnoliver/master

Add more learning curve and correlation data
Merge pull request #3 from johnoliver/master

add slides for Monitoring, Self Validation and Null Hypothesis
finish part 1
Merge pull request #4 from johnoliver/master

add more images
part 2
Merge branch 'master' of github.com:RichardWarburton/Better-than-a-coin-toss
tidy up
tyson
section transitions, more content
moar
fix up biases
adds elbow estimator
section summary
add caching in graph
black swan
typo
more tidy up
Rejig learning curve. Add images for trees