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
updated docs to fix formatting errors
Merge pull request #2163 from ianozsvald/fix_plot_forest_iris_docs

Updated docs to fix formatting errors
PY3 use urllib2 or urllib.request, based on Py2/3

Also fixes #2166.
DOC let OneHotEncoder, DictVectorizer and FeatureHasher refer to each other

Judging by ML and SO questions, users have a hard time finding the right
vectorizers and don't know how to trade off the benefits of these three
classes.
DOC correct class_weight description for LogisticRegression