SML+WEB: fix typo in Jens' name
WEB+SML: proper TOC for philosophy
WEB+EXC: add links to datase, targets and chunks description
WEB: update representation of dataset
ENH+SML: explicit creation of figures
ENH+EXC: simplify exercise for load dataset basics
EXC: more comments
BF+EXC: fix name of input filename
WEB: add ref to slicing
EXC+SML
RF+BK: compute sum of weighted correlations in cosmo_correlation_measure, rather than the mean. This should not affect group statistics (because it scales the data) but can affect results from individual subjects
RF: update test to reflect change in correlation_measure
RF: use ds as most common input
EXC: update classification exercise
EXC+SML: add link to naive bayes classifier
EXC: update cross validation exercise
EXC+SML: add header ref
RF+EXC: clarify split-half correlation exercises
SML: clarify removing constant features
DOC: split exercise in two parts