BUG: Bug in Series 0-division with a float and integer operand dtypes  (GH7785)
Merge pull request #7786 from jreback/div

BUG: Bug in Series 0-division with a float and integer operand dtypes  (GH7785)
TST: unicode compat for test_astype_unicode (GH7758)
BUG/COMPAT: pickled dtindex with freq raises AttributeError in normalize related ops
BUG: reset_index with MultiIndex contains PeriodIndex raises ValueError
fix length of underlinings.
BUG: is_superperiod and is_subperiod cannot handle higher freq than S
DOC: added nanosecond frequencies to doc
Docs: Be more specific about inf/-inf no longer being treated as nulls.
Merge pull request #7804 from sinhrks/nanodoc

DOC: added nanosecond frequencies to doc
Merge pull request #7800 from lexual/indexing_docs_structure_fix

Correct docs structure in indexing docs.
Merge pull request #7789 from sinhrks/normalize_pickle

BUG/COMPAT: pickled dtindex with freq raises AttributeError in normalize...
Merge pull request #7805 from lexual/docs_inf_as_null_note

Docs: Be more specific about inf/-inf no longer being treated as nulls.
Merge pull request #7802 from sinhrks/reset_index_bug

BUG: reset_index with MultiIndex contains PeriodIndex raises ValueError
Merge pull request #7803 from sinhrks/superperiod

BUG: is_superperiod and is_subperiod cannot handle higher freq than S
BUG: Fix for multiple ints as levels in DataFrame.stack()

Fix for multiple level numbers

If passed levels match level names, use them directly

Add test cases for multiple stacking

Add check for out of range negative level num in _get_level_number()

Use _get_level_number() to do validation and conversion

Explain why level list isn't iterated over directly

Raise exception on fall-through case

Add test cases for raising exceptions

Use _get_level_number() to convert and validate negative levels

Add changes to release notes

Fix Python 2.6 build issue: use assertRaisesRegexp from testing module

Add tests for out of bounds level numbers

Move API change note to correct section

Add blank line after if/elifs

Add blank line between sections

Too many blank lines between functions

Add multiple stacking examples

Reference to new examples in What's new docs

More blank lines between sections

Remove unused itertools import