BUG: typo fixes in sklearn.mixture.gmm
Merge pull request #2614 from zyv/patch-1

BUG: typo fixes in sklearn.mixture.gmm
MAINT: fix broken links to numfocus.org on donations page.
Merge pull request #2615 from rgommers/fix-numfocus-link

MAINT: fix broken links to numfocus.org on donations page.
fix: pass warm_start to BaseSGDRegressor
fix: make Regressor test case extend CommonTest (move two clf specifc tests to clf test case)
DOC be more explicit on mean-shift scalability

Fixes #2613.
Merge pull request #2617 from pprett/sgd-regressor-fix

[MRG] pass warm_start to BaseSGDRegressor
FIX stop forcing deprecation warnings for external packages
FIX use of str.format for Py2.6
speedup for docbuild using joblib
change cache directory
Merge pull request #2620 from jaquesgrobler/master

ENH: speedup for docbuild using joblib
fix broken link for stable version from dev version
Merge branch 'master' into DOC_olivier_tut
remove extra headings from tuts page