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
DOC: add HTML bad-request cookbook example