FIX : omp default param could fail
ENH : use local seed + avoid warning
Improved documentation of the "estimator_params" argument for RFE and RFECV.

Changed the documentation for the "estimator_params" argument for both
RFE and RFECV to better indicate how it could be useful for doing a
grid search. Previously the documentation may have indicated that RFE
and RFECV would perform a grid search if "estimator_params" was passed
a grid of parameter values, which is not the actual behavior.
DOC: DBSCAN: there's no calculate_distance function
Merge pull request #3208 from staubda/improve_RFE_doc

Improved documentation of the "estimator_params" argument for RFE and RF...
DOC: improve feature_extraction.text docstrings

Partial solution to #3210.
MAINT: joblib 0.8.0
Merge pull request #3212 from ogrisel/joblib-0.8.0

MAINT: joblib 0.8.0
DOC: Replace GT/LT with angle brackets for inner product
Merge pull request #3217 from bwignall/innerprod

DOC: Replace GT/LT with angle brackets for inner product
ENH Dense pipeline support for RandomTreesEmbedding via sparse_output param
ENH: use partial sort for kneighbors selection
CLN: Fix typo
Merge pull request #3225 from bwignall/quickfix-typo

CLN: Fix typo
ENH: make trees work with very small max_features.

Trees do no longer fail if int(max_features*n_features) == 0, but use
max_features=1 if the max_features paramater was larger than 0.0

Fixes #3171.
TST skip flaky label propagation test

The optimization in 46aebf132b65e9a6c54b2747c864c6401cd5c56f broke
a test that relied on the exact ordering of k-NN in a test on a minute
dataset.
CLN: Capitalize "Gaussian" in example docstrings
Merge pull request #3176 from agramfort/omp_default

MRG : omp default param could fail
Merge pull request #3230 from bwignall/quickfix-gaussian

CLN: Capitalize "Gaussian" in example docstrings
CLN: Capitalize "Dirichlet" and "Mexican" in example docstrings