ENH: Added CustomBusinessMonth offset.
API: align Panel.shift API with generic
change pct_change back to a kwarg
Merge pull request #6928 from TomAugspurger/panel_shift_kwarg

API/DEPR: Match Panel.shift()'s signature to generic
Deprecate order kwarg in factorize
BUG/INT: Internal tests for patching __finalize__ / bug in concat not finalizing (GH 6927)
Merge pull request #6866 from bjonen/cbm

Custom Business Month
Merge pull request #6931 from jreback/finalize2

BUG/INT: Internal tests for patching __finalize__ / bug in concat not finalizing (GH6927)
ENH: Use Welford's method in stats.moments.rolling_var

This PR implements a modified version of Welford's method to compute
the rolling variance. Instead of keeping track of the sum and sum of
the squares of the items in the window, it tracks the mean and the sum
of squared differences from the mean. This turns out to be (much) more
numerically stable.

The formulas to update these two variables when adding or removing an
item from the sequence are well known, see e.g.

http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance

The formulas used when both adding one and removing one item I have
not seen explicitly worked out anywhere, but are not too hard to come
up with if you put pen to (a lot of) paper.
Merge pull request #6930 from TomAugspurger/factorize-kwarg

API/DEPR: Deprecate order kwarg in factorize
add bins argument to histogram

add bins to histrogram
Merge pull request #6817 from jaimefrio/rolling_var-welford

ENH: Use Welford's method in stats.moments.rolling_var
CLN: failing test on 2.6/windows re GH6866, CustomBusinessMonth
DOC: release/v0.14.0.txt edits
Merge pull request #6850 from zachcp/histograms

DOC: add bins argument to Histogram function
BUG: pass bins arg in hist_frame
Merge pull request #6935 from TomAugspurger/hist-fix

BUG: pass bins arg in hist_frame
API: change AssertionError to TypeError for invalid types passed to concat (GH6583)
REGR: TextFileReader in concat, which was affecting a common user idiom (GH6583)
Merge pull request #6941 from jreback/concat

REGR/API: accept TextFileReader in concat (GH6583)
bug fix: Series/DataFrame.rank() doesn't handle small floats correctly