BUG: TimeSeries not properly deserializing for < 0.13 (deprecations); additional tests

ENH: add 32-bit 2.7 pickle from 0.12

BUG: fixed py3 load_reduce; weird encoding on nan
Merge pull request #4755 from jreback/pickle_compat

BUG: TimeSeries compat from < 0.13
BUG: Bug with reindexing where a non-unique index will now raise ValueError (GH4746)
CLN: refactored out take from core/frame.py to use core/generic.py version
Merge pull request #4757 from jreback/reindex_er

BUG: Bug with reindexing on the index with a non-unique index will now raise a ValueError
BUG: allow replacement with a single list

This requires adding the ``method`` keyword parameter back in.