PEP 8 Box plot
Remove printing the results of non-parametric tests which are not implemented in the box plot
Fix bugs in DiscreteVariable.find_compatible
Easier wrapping of scikit-learn methods.
Do not pass Y in one-class svm.
Fix DiscreteVariable.find_compatible not to fail when there are no existing variables with this name
Add tests for DiscreteVariable.make
Merge pull request #140 from thocevar/tree

Compute examples and class distributions in tree nodes.
Add sampling option to heatmap widget.
Merge pull request #142 from astaric/heatmap-on-sample

Add sampling option to heatmap widget.
Added color scale options.
Time-based sampling on heatmap.
Insure at least some coloring for non zero cells.
Merge pull request #144 from astaric/time-based-sampling

Time-based sampling on heatmap.
Use the actual maximum contingency value for scaling factor.

Before the maximum value in the root was used.
Change sampling options.
Undo change to n_bins.
Merge pull request #145 from ales-erjavec/heatmap

Heatmap color scale
Revert to no outlines.
Add distance measures

Added distance measure Eulidean, Mahalanobis, SpearmanR, SpearmanAbsolute, PearsonR, PearsonRAbsolute