MOD use safe_asarray instead of np.asarray
MISC update my mailmap
added links to astropy and scipy workflow guids
Merge pull request #1564 from jaquesgrobler/contributor_guide_links

added links to astropy and scipy workflow guids
MOD address @mblondel's comments
MOD move generating matrix out of the loop
DOC: Fixed wrong link and formatting in decomposition docs
DOC: fixed latex and formatting in SVM docs
Merge pull request #1563 from kuantkid/sparse_knn_graph

KNN graph fails for sparse inputs
DOC more accurate comment in class weight computation
FIX make sure laplacian in spectral clustering test is really PSD
DOC: more consistency in metrics docstrings
DOC: More consistency in metrics and clustering metrics docstrings
DOC: more consistency in docstrings for unsup clustering metrics & missing link
DOC: fixed missed details in metrics docstrings
DOC: addressed more inconsistencies in metrics docstrings
zero_one_loss now does normalize on default.
DOC add recall_score to new classification metrics listing
Changed a minus sign to a plus sign in the documentation of n_jobs in some files.
Merge pull request #1577 from ApproximateIdentity/n_jobs-documentation

Changed minus sign to plus sign in the docs of n_jobs in some files.