Added utility to skip tests if running on Travis
Added FIXME annotation to skipped test
Merge pull request #3353 from kastnerkyle/skip_ompcv_travis

[MRG+1] Skip test for OrthogonalMatchingPursuitCV if running on Travis
Corrected two typos in docstring.
#3356 - Added an exception raising when np.nan is passed into a HashingVectorizer.
#3356 - Added an exception raising when np.nan is passed into a HashingVectorizer.
Merge pull request #3375 from ldirer/hashing_fix3356

Corrected two typos in docstring.
Changed solver from 'dense_cholesky' to 'cholesky' to eliminate deprecation warning.
MAINT ensure that examples figures are displayed in the correct order
MAINT: more explicit glob pattern in doc generation
Merge pull request #3378 from kastnerkyle/dense_cholesky_warnings

[MRG] Eliminate dense cholesky warning during tests
Lift division out of loop in _isotonic_regression.

I'm surprised the C compiler doesn't do this, but it seems
to make a difference in the benchmarks.

Conflicts:
	sklearn/_isotonic.c
DOC: more readable whats_new
DOC: fix classes not referenced in docs
FIX: check with tolerance on lars_path

Hopefully this will fix issue #3370 but I haven't checked.
Cosmetic np.abs -> abs
TEST: metrics sample_weight test: almost_equal

The test was too strict and failing on certain boxes
MAINT: skip some unstable transformers test under Win 32
MAINT configure Windows CI with appveyor.com