ENH ohlc resample for DataFrame
CLN refactor with _apply_to_column_groupbys
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.
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