hover removed from nature, jquery more recent version, containerexpansion on mouseover add
image resizing added
Zoom bug fixed
added docstring space to popup block
docstrings embedded into example hovers
Final visual effects added to hovering
Nelle`s review fixes addressed
Cross browser shadows covered
remove forgotten print
shorten displayed dosctring to 95 chars
fix white space inconsistency between header and docstring
example docstring fixes
logistic regresion example fix
firefox bug fixed
 classifiers comparison fix
WIP: new Cython interface for decision trees
WIP: comments on the Cython interface
WIP: Criterion interface and base class
WIP: ClassificationCriterion (reset, update)
WIP: Gini criterion