fix decisiontree?
some decisiontree fixes
tree tracer finished
better hmm drawer
fixing drawer
parameterizing
important bugfix
reformats and more tests
temp commit (by cron)
added travis support
reorganisation
test organisation fix
introducing calculators subpackage
created more regression tests
refactoring and removing imports
more convinient opdf method signatures
regression test for FB calculator, fails :(
fixing test, improving speed
improving alpha speed
major bugfic