BUG: prevent double plot in Series.hist
DOC: expand the documentation on the xs method
DOC: fix read_stata formatting typo
Merge pull request #4921 from cpcloud/mi-doc-blurb

DOC: expand the documentation on the xs method
Merge pull request #4113 from cpcloud/double-fig-series-hist-by-fix

BUG: make sure fig is not doubled when passing by to series.hist
DOC: show disallowed/allowed eval syntax
Merge pull request #4922 from cpcloud/eval-syntax-docs

DOC: show disallowed eval syntax
BUG: Fixed a bug in convert_objects for > 2 ndims GH4937
Merge pull request #4938 from jreback/panel_convert

BUG: Fixed a bug in convert_objects for > 2 ndims GH4937
ENH: Add 'is_' method to Index for identity checks

Adds a method that can quickly tell whether something is a view or not
(in the way that actually matters).

CLN: change 'is' check to 'is_' check in 'equals()'
Merge pull request #4909 from jtratner/add-is_-method-to-index

ENH: Add 'is_' method to Index for identity checks
ENH: Added xlsxwriter as an ExcelWriter option.

Added xlsxwriter as an optional writer engine. Issue #4542.
Merge pull request #4857 from jmcnamara/enh_xlsxwriter2

ENH: Added xlsxwriter as an ExcelWriter option.
BUG: Fixed a bug in DataFrame/Panel cache insertion and subsequent indexing GH4939
Merge pull request #4942 from jreback/index_cache

BUG: Fixed a bug in DataFrame/Panel cache insertion and subsequent indexing GH4939
BUG: Fix FrozenNDArray & FrozenList string methods

Plus basic tests (i.e., "Hey! If you pass me unicode I don't fail -
yay!")
Merge pull request #4929 from jtratner/fix-repr-on-FrozenNDArray-and-FrozenList

BUG: Fix FrozenNDArray & FrozenList string methods
ENH: Make ExcelWriter & ExcelFile contextmanagers

both can be used in with statements now. Makes it easier to use with
multiple writers, etc.

Plus touch up the docs on writers and such.
Added to docstrings in factorize function
DOC: add HTML bad-request cookbook example