inital checkin
first plot working
working boxplot
pep8/257 fixes
more pep8/257 fixes
Fix bug identified in #1817, comment 17340049
Release the GIL at tree building time
Put more code under non-GIL block
MAINT remove mlcomp document classif. example

It's redundant given the other 20newsgroups example.
Merge pull request #2528 from ogrisel/tree-nogil

[MRG] Release the GIL at tree building time
Add implementation of RANSAC algorithm
Add ransac function to __init__.py of utils package
Fix bug in residual determination
Add step-by-step description of RANSAC algorithm
Add parameter description to RANSAC and modify API
Add example plot script for RANSAC
Add simple RANSAC unit test
Add unit tests for RANSAC is_model_valid and is_data_valid
Add unit tests for RANSAC max_trials option
Return number of trials in RANSAC