BUG: Fix DatetimeIndex.insert() with non-datetimes.

Coerces to object Index instead.
COMPAT: allow string concats to datetimeindex only (int/float are invalid)
BLD: fix cythonized msgpack extension in setup.py GH5831
DOC: r match function
Update comparison_with_r.rst

rm index
Update comparison_with_r.rst
DOC: Add two examples to to_datetime
Merge pull request #5887 from jseabold/to-datetime-example

DOC: Add two examples to to_datetime
BLD: Send Travi-CI results to ScatterCI
BUG: Bug in internal caching, related to (GH5727)
Merge pull request #5892 from jreback/mi_setitem

BUG: Bug in internal caching, related to (GH5727)
Merge pull request #5893 from y-p/PR_ScatterCI

BLD: Send Travis-CI results to ScatterCI
BLD: fix travis.yml
TST: Testing bug in reading json/msgpack from a non-filepath on windows under py3 (GH5874)
Merge pull request #5894 from jreback/json_file

TST: Testing bug in reading json/msgpack from a non-filepath on windows under py3 (GH5874)
Fix bug where use of .ix[tuple(...)]=x fails to correctly check out of bounds index for columns. This is a regression as it used to work in pandas 0.12.0. The code incorrectly checks the column index against the len() of the dataframe to see if it is in bounds not against the number of columns. Have added 2 tests with non-square dataframes to test that the fix works.
BUG when assigning to .ix[tuple(...)
Merge pull request #5896 from ahlmss/AHLRAP-3152

Fix bug where use of .ix[tuple(...)]=x fails to correctly check out of b...
Merge pull request #5844 from y-p/PR_msgpack_setup

BLD: fix cythonized msgpack extension in setup.py GH5831
DOC: rolling apply additions to cookbook.rst