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

Coerces to object Index instead.
COMPAT: allow string concats to datetimeindex only (int/float are invalid)
DOC: r match function
Update comparison_with_r.rst

rm index
Update comparison_with_r.rst
BUG: Bug in creating an empty DataFrame, copying, then assigning (GH5932)
Merge pull request #5935 from jreback/empty_frame_copy

BUG: Bug in creating an empty DataFrame, copying, then assigning (GH5932)
BLD: Explicitly request utf-8 encoding in docs conf.py (is default)
DOC: suppress warning during doc building
Fix bug 5846
ENH: Add regex=True flag to str_contains
Using regex=False can be faster when full regex searching is not needed.
See http://stackoverflow.com/q/20951840/190597

TST: Add a test for str_contains with regex=False
BUG: Not all strings.str_* functions return an object with an ndim attribute.
PERF: add benchmarks for every str method
Merge pull request #5879 from unutbu/str-contains

ENH: Add regex=True flag to str_contains
Merge branch 'master' of https://github.com/MichaelWS/pandas into MichaelWS-master
API: Raise/Warn SettingWithCopyError (according to the option chained_assignment in more cases,
    when detecting chained assignment, related (GH5938)
Merge pull request #5939 from jreback/chained

API: Raise/Warn SettingWithCopyError in more cases
BUG: Bug in propogating metadata on resample (GH5862)
Merge pull request #5942 from jreback/finalize

BUG: Bug in propogating metadata on resample (GH5862)
API: add read_gbq to top-level api, closes (GH5843)
ENH: enhance apply() on Panel for arbitrary functions (rather than just ufuncs) (GH1148)
ENH: add property dtypes on Panel objects
ENH: allow multiple axes to be passed to axis on a Panel to process slabs