DOC: prepend missing >>> to docstring Examples in set_index.
BLD: bring back build_ext warning message cython is missing #2439
BLD: fixed file modes
Merge pull request #2920 from pydata/modes

BLD: fixed file modes
CLN: replace np.flatten() with np.ravel() if copy is not necessary

BLD: added to vbench, df_to_csv_mixed (mixed frame with mixed dtypes)
ENH: update find_undoc_args to generate github task lists ftw
DOC: update CONTRIBUTING.MD
ENH: find_undoc_args.py, sort by filename
Merge pull request #2921 from jreback/ravel

ENH: change flatten to ravel (in internals/pytables)
BUG: formatting for Series printing was multiple Dtype lines
BUG: pathological case on SparseSeries with 0-len array and compression (GH 2931)
Merge pull request #2933 from jreback/pytables_2931

BUG: fixes issue in HDFStore w.r.t. compressed empty sparse series (GH #2931)
Merge pull request #2930 from jreback/series_format

BUG: formatting for Series was printing multiple Dtype lines for long display
BUG: timezone offset double counted using date_range
BUG: fixes handling of the 'kind' argument in Series.order (GH #2811)
Merge pull request #2937 from wj/master

BUG: fix handling of the 'kind' argument in Series.order (GH #2811)
CLN: clarify series.order() logic
BUG: DateTimeIndex.append broken with tz-aware indices
DOC: updated dtypes docs
Merge pull request #2947 from jreback/dtypes_doc

DOC: updated dtypes docs