ENH ohlc resample for DataFrame
CLN refactor with _apply_to_column_groupbys
TST: (GH4550) where with a dup index in Series
BUG: (GH4548) inplace updating of a duplicate Series with a boolean aligning incorrectly
BUG: Fix read_fwf with compressed files.

`gzip` and `bz2` both now return `bytes` rather than `str` in Python 3,
so need to check for bytes and decode as necessary.
Use passed encoding to decode bytes
ENH: Add axis and level keywords to where, so that the other argument
     can now be an alignable pandas object.
CLN: add Timestamp reference in core/common.py
CLN: default for tupleize_cols is now False for both `to_csv and read_csv. Fair warning in 0.12 (GH3604)
BUG: pickle failing on FrozenList, when using MultiIndex (GH4788)

INT: add __reduce__ to FrozenList for pickle support

INT: add 32-bit 2.7/3.2 pickles

INT: add AMD64 0.12.0 pickle

TST: add round-trip test for current version

INT: remove 0.13 testing
CLN: move clip to core/generic (adds to Panel as well), related to (GH2747)
CLN: move align out of series consolidating into core/generic.py
BUG: Fixed an issue with a duplicate index and assignment with a dtype change (GH4686)
CLN: removed need for Coordinates in HDFStore tables, instead return an Index of the coordinates
DOC: added section on select_as_coordinates
DOC: fix typos in missing_data.rst
DOC: added .item() to __nonzero__ error message
DOC: add panelnd section to cookbook.rst
API: Complex compat for Series with ndarray. (GH4819)
ENH: Allow abs to work with PandasObjects
DOC: doc build fixes