inital checkin
first plot working
working boxplot
pep8/257 fixes
more pep8/257 fixes
Fix bug identified in #1817, comment 17340049
MAINT remove mlcomp document classif. example

It's redundant given the other 20newsgroups example.
Add a estimator introspection check to test_common
ENH make sure all "SkipTest" calls have an error message.
don't import tests
FIX don't raise file-level SkipTests
Merge pull request #2538 from ogrisel/test-test-common

[MRG] Investigate test_common non-running on travis
Merge pull request #2536 from larsmans/rm-mlcomp-doc-class

MAINT remove mlcomp document classif. example
LOO is bad doc
Update cross_validation.rst

Minor typo fixes.
Update feature_selection.rst

Fix inconsistency in name of classifier and link to classifier.
Merge pull request #2546 from StevenMaude/patch-1

Update feature_selection.rst; minor doc fix
updated for typos and a few wording changes
one last comment fix
Add plot titles and newstyle plt import in OLS vs Ridge example