PERF: dataframe.from_records: read into list w/ itertools.islice when specifying nrows #6700
StataWriter: Replace missing values in string columns by an empty string
ENH: added nunique and value_counts functions to Index
Merge pull request #6734 from sinhrks/ind_nunique

ENH: added nunique function to Index
BLD: spring cleaning on Makefile
Merge branch '6700_dataframe_from_records_itertools' of https://github.com/westurner/pandas into westurner-6700_dataframe_from_records_itertools

Conflicts:
	doc/source/release.rst
	vb_suite/frame_methods.py
TST: dtype fix for test_base, from PR 6734)
Merge pull request #6784 from cpcloud/clean-up-makefile

BLD: spring cleaning on Makefile
BUG: Fix unconverting of long strings from HDF (GH6166)
TST/BUG: make the gender variable non random in test_hist_by_no_extra_plots
CLN: leftover rebasing from 405018c
BUG: DataFrame._reduce was converting integers to strings in mixed-type
case.
BUG: Remove creating np.array. This allows us to use our own logic for
promoting dtypes. #6806

BUG: Only convert 0/1 ints to bool. #6806

DOC: added release notes
Merge pull request #6823 from cpcloud/vbench-git-fix

CLN: leftover rebasing from 405018cf
Merge pull request #6821 from jreback/unconvert2

BUG: Fix unconverting of long strings from HDF (GH6166)
Merge pull request #6822 from cpcloud/no-random-hist-by-test

TST/BUG: make the gender variable non random in test_hist_by_no_extra_plots
DOC: add versionadded for hdf.default_format (GH6554)
BENCH: add vbench for issue 6697
Merge branch 'mixed_dtype_string_promotion' of https://github.com/dalejung/pandas into dalejung-mixed_dtype_string_promotion

Conflicts:
	doc/source/release.rst
BUG: Regression from 0.13 with fillna and a Series on datetime-like (6344)
Merge pull request #6824 from jreback/fillna

BUG: Regression from 0.13 with fillna and a Series on datetime-like (6344)