FIX limit warnings for recall_score, precision_score, f1_score,
fbeta_score
Merge branch 'master' of https://github.com/scikit-learn/scikit-learn into prf_derivative_warnings
COSMIT use assert_no_warnings where appropriate
Merge pull request #2592 from jnothman/prf_derivative_warnings

FIX limit warnings for recall_score, precision_score, f1_score,
MAINT: use $(MAKE) for recursive make

For people who want to use custom make, e.g. GNU make on Solaris or BSD.
DOC add sklearn.base to generated docs

Fixes #1449.
ENH use fast row_norms helper in preprocessing.normalize

Also makes memory usage independent of n_features.
ENH use fast row_norms in dictionary learning