Added GraphLassoCV changes to whatsnew.rst
[DOC] Corrected errors in clustering documentation

Some informations given in the narrative documentation about K-means
were wrong (stopping criteria, mainly).

Fixed some typos and spelling errors as well.
[DOC] fixed a typo in an warning message.
One more typo fixed
Merge pull request #2247 from pgervais/docfixes

Doc fixes
ENH consistency mse=> mean_squared_error ari => adjusted_rand_score
FIX docstring
FIX hopefully fixing travis.
FIX hopefully fixing travis.
FIX OrthogonalMatchingPursuit normalized twice
DOC correct/copyedit linear model docstrings

Many models actually support sparse matrices at predict time, but
did not advertise this.
One more Python 3 fix in feature_extraction.rst
Update what's new
BUG: fix some numpy 1.3 compat issue
BUG: numpy 1.6 compat
:
Py3 fix
DOC improve svm sample weight example
DOC improve documentation of sample_weight, add to docstring.
TST small improvement of test for sample weight in svm