BUG/API groupby head and tail act like filter, since they dont aggregage, fixes column selection
BUG: fix fancy indexing with empty list
ENH: Keep series name in GroupBy agg/apply ops

When possible, attempt to preserve the series name when performing groupby
operations.  This facilitates reshaping/indexing operations on the result of the
groupby/apply or groupby/agg operation.  Fixes GH6265 and GH6124.  Added
example to groupby.rst and description to API changes for v0.14.
DOC add groupby head and tail to docs
Merge pull request #6068 from bburan-galenea/bburan/dataframe_groupby_apply_series_name

ENH: Keep series name when merging GroupBy result
BUG: Fix irregular Timestamp arithmetic types #6543
Merge pull request #6533 from hayd/groupby_head

API change in groupby head and tail
BLD: change wheel url to pandas.pydata.org
BLD: remove scikit-timeseries from the deps and builds
BLD: numpy_master bld to use lastest pytz/python-dateutil
Merge pull request #6567 from jreback/versions3

BLD: change wheel url to pandas.pydata.org
BLD: add bottleneck 0.8.0 to 3.3 build
Merge branch 'fix-fancy-indexing-empty-list' of https://github.com/immerrr/pandas into immerrr-fix-fancy-indexing-empty-list

Conflicts:
	doc/source/release.rst
ENH: Allow timestamp and data label to be set when exporting to Stata

Added code which allows the time stamp and the data label to be set using
either StataWriter or to_stata.  Also simplified reading these values using
StataReader by removing null bytes from the string values read.

Added basic test for both.

Also fixed one small bug where variables could be stored using Stata reserved
words.