API: return None when inplace=True. re #1893
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
BUG: check and raise on df.applymap with df having dupe columns
Merge pull request #3212 from wesm/inplace-not-return-self

API: return None when inplace=True. closes #1893
TST: add rolling_mean test, validate against numpy.convolve based rolling_mean— y-p
BUG: rolling_X functions mishandle edges when center = True
ENH: translate min_periods before passing into _rolling_moment

minp is relavent for fixing up edges, not just down in the cython code
TST: modify check_moment to accomedate expected center=True behaviour
ENH: make padding value a param of _rolling_moment
Fixes to roll_skew, roll_kurt
generalize to multi dimensional case
TST: bring back test_moments tests for frames
Refactor, Sort out the 2d case
Rework tests