DOC: remove unused matplotlib directives from conf.py
COMPAT: remove Index warnings from io/ga.py
ENH: Add categorical support for Stata export

Add support for exporting DataFrames containing categorical data.

closes #8633
xref #7621
Do not convert series when looking at sub-daily frequencies.
Removing typo as Renaming

Should be 'Removing', I think, if I'm not misunderstanding.
Merge pull request #8800 from gepcel/patch-1

Removing typo as Renaming
Merge pull request #8756 from jorisvandenbossche/mpl-directives

DOC: remove unused matplotlib directives from conf.py
Merge pull request #8767 from bashtage/stata-categorical

ENH: Add categorical support for Stata export
DOC: escape asterisks
TST: Skip hist testing for matplotlib <= 1.2

Add skip to the hist test

Add to release notes
TST: Add test for get_data_google dtypes
BUG: "converters" in read_excel with missing data
Merge pull request #8810 from onesandzeroes/mplskip

TST: Skip hist testing for matplotlib <= 1.2
Merge branch 'issue3995' of https://github.com/dstephens99/pandas into dstephens99-issue3995

Conflicts:
	doc/source/whatsnew/v0.15.2.txt
docs fix (?)
Merge branch 'infer_freq' of https://github.com/rockg/pandas into rockg-infer_freq

Conflicts:
	doc/source/whatsnew/v0.15.2.txt
Fix unrecognized 'Z' UTC designator
Merge branch 'fix-z-designator' of https://github.com/broessli/pandas into broessli-fix-z-designator

Conflicts:
	doc/source/whatsnew/v0.15.2.txt
Revert "Fix unrecognized 'Z' UTC designator"

This reverts commit 0e02d5f275234b11d699ce13aa4da4f3624d0f7d.

Conflicts:
	doc/source/whatsnew/v0.15.2.txt
DOC: Added get_group subsection