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
Merge pull request #4779 from jreback/dups_ops

TST/BUG: duplicate indexing ops with a Series using where and inplace add buggy (GH4550/GH4548)
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
Merge pull request #4784 from jtratner/fix-read-fwf-with-compression

BUG: Fix read_fwf with compressed files.
ENH: Add axis and level keywords to where, so that the other argument
     can now be an alignable pandas object.
Merge pull request #4740 from hayd/ohlc_dataframe

ENH ohlc resample for DataFrame
Merge pull request #4781 from jreback/where

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
Merge pull request #4791 from jreback/pickle_fix

BUG: pickle failing on FrozenList, when using MultiIndex (GH4788)
Merge pull request #4797 from jreback/clean_csv

CLN: default for tupleize_cols is now False for both to_csv and read_csv. Fair warning in 0.12 (GH3604)
CLN: move clip to core/generic (adds to Panel as well), related to (GH2747)
Merge pull request #4798 from jreback/clip

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
Merge pull request #4800 from jreback/series_align

CLN: move align out of series consolidating into core/generic.py