COMPAT: remove Index warnings from io/ga.py
BUG: Bug in csv parsing when passing dtype and names and the parsed data is a different data type (GH8833)
BUG: Stacking with multiple mixed int/str levels

Add test case for mixed type stacking

Used wrong var name in the assert

Method to swap levels assuming ints are level numbers

Fix _stack_multi_columns to deal with mixed strs/ints

Extra testcases

Add fix to the release notes

Convert to label before swaplevel if possible

Revert "Method to swap levels assuming ints are level numbers"

This reverts commit 61f96fd3cb23cda9f9c7a6837b145ebd247a55cc.

More test cases

Use _convert_level_number() to sort columns
Merge pull request #8834 from jreback/parser

BUG: Bug in csv parsing when passing dtype and names and the parsed data is a different data type (GH8833)
Merge pull request #8785 from jreback/ga_warn

COMPAT: remove Index warnings from io/ga.py
TST: add tests for index.groupby (GH5620)
Merge pull request #8809 from onesandzeroes/stackfix

BUG: Passing multiple levels to stack when having mixed integer/string level names (#8584)
BUG: Implement step in slice StringMethod

Resolves #8754.
Add test for __getitem__ syntax on str
Make step None (same as 1) for consistency
Merge pull request #8843 from jtratner/support-step-in-str-slice

BUG: Implement step in slice StringMethod
Merge pull request #8840 from jorisvandenbossche/gh5620

TST: add tests for index.groupby (GH5620)
BUG: Defined .size attribute across NDFrame objects to provide compat with numpy >= 1.9.1; buggy with np.array_split (GH8846)
Merge pull request #8847 from jreback/size

BUG: Defined .size attribute across NDFrame objects to provide compat with numpy 1.9.1
DOC: api updates for .size