API: return None when inplace=True. re #1893
BUG: stacking with MultiIndex column with some unused level uniques fails #3170
BUG: remove unused columns from final result
TST: PeriodIndex pickle roundtrip does not recreate freq GH2891
BUG: PeriodIndex pickle roundtrip does not recreate freq GH2891
Merge pull request #3224 from y-p/GH2891

PeriodIndex pickle roundtrip does not recreate freq GH2891
ENH index diff respects names
DOC: update RELEASE.rst
BLD: Compact builds to fit into travis's 5-job concurrency limit
DOC: update CONTRIBUTING.md
BUG: GH3216 Upcast when needed to DataFrame when setitem with indexer
ENH: On a mixed DataFrame, allow setting with indexers with ndarray/DataFrame on rhs
Merge pull request #3219 from jreback/GH3216

BUG: GH3216 Upcast when needed to DataFrame when setitem with indexer
BLD: Travis revamped their log widget, be verbose and fold furiously
TST: mom._center_window should validate axis value against data dims
BUG: mom._center_window should validate axis value against data dims
Merge pull request #3225 from hayd/index_sub_names

BUG/ENH Index sub names
BUG: week of year incorrect at year boundaries #2768
Revert "BLD: Travis revamped their log widget, be verbose and fold furiously"

This reverts commit 18d3893c651cb74078519a3edd8aaf10b4bb612b.

Log file is too big, display is delayed too much
BLD: tox, don't clean up build dir, permissions often get in the way
TST: check and raise on df.applymap with df having dupe columns