added rug plot method
Removed useless tools. They will be replaced by new one
Added Sample based methods which regroups both ConfidenceInterval on samples and Conditional probabilities on samples too. On going work
fixed minor bug in sbm. Removed useless conditionalSample. Ongoing work
updated sbm: we use numpy for better performances
cosmetics in poeevent: indentation mainly
updated sbm tool: splitted confidence interval class into various methods