FIX raise when groupby selecting cols not in frame
ENH: define the order of resolution for index vs columns in query/eval
Merge pull request #6677 from cpcloud/index-resolvers-after-columns

ENH: define the order of resolution for index vs columns in query/eval
BUG: Bug in binary operations with a rhs of a Series not aligning (GH6681)
Merge pull request #6682 from jreback/binary_op

BUG: Bug in binary operations with a rhs of a Series not aligning (GH6681)
BUG: NaN values not converted to Stata missing values

Stata does not correctly handle NaNs, and so these must be replaced with Stata
missing values (. by default).  The fix checks floating point columns for nan
and replaces these with the Stata numeric code for (.).  One of the code paths
which writes files correctly handled this case, and this last-minute check was
removed.

The write_index option was also being ignored by omission. This has been fixed
and numerous tests which were not correct have been fixed.

Also contains some additional tests which were uncovered edges cases related to
fix.
Merge pull request #6685 from bashtage/stata-world-indicators

BUG: NaN values not converted to Stata missing values (GH6684)
BUG: Bug in resample with extra bins when using an evenly divisible frequency (GH4076)
Merge pull request #6690 from jreback/resample_bin

BUG: Bug in resample with extra bins when using an evenly divisible freq (GH4076)
Update documentation on visualization to mention using pandas objects directly with matplotlib and the automatically installed date and time formatter.
Merge pull request #6660 from agijsberts/docs-plot-with-mpl

DOC: Mention date and time formatting available throughout MPL
Deprecate cols in to_csv, to_excel, drop_duplicates, and duplicated.  Use decorator.  Update docs and unit tests. [fix #6645, fix#6680]
PERF: dataframe.from_records: read into list w/ itertools.islice when specifying nrows #6700
DOC: add to docstring of core/groupby/Grouper
BLD: use numpy 1.8.1 in 2.7 build
     use scipy 0.13.3 in 3.3. build
BLD: move sql libs up in requirements to facilitate building wheels
dataframe bar plot can now accept align keyword
Merge pull request #6691 from sinhrks/bar_center_pr

ENH/VIS: Dataframe bar plot can now handle align keyword properly
EHN/FIX: Add na_position parameter to DataFrame.sort. Fixes GH3917
TST: Skip mergesort test if `np.argsort` raises TypeError on any mergesort.
Merge pull request #5231 from unutbu/nan-sort

EHN/FIX: Add na_last parameter to DataFrame.sort. Fixes GH3917
BUG: Bug in consistency of groupby aggregation when passing a custom function (GH6715)