ENH: pd.infer_freq() will accept a Series as input
API: pd.infer_freq() will now raise a TypeError if given an invalid Series/Index type (GH6407)
Merge pull request #6408 from jreback/freq_ops

API: pd.infer_freq interacts correctly with a Series
API: validate conversions of datetimeindex with tz, and fixup to_series() to handle (GH6032)
Merge pull request #6398 from jreback/index_coerce

API: validate conversions of datetimeindex with tz, and fixup to_series() to handle (GH6032)
DOC: use ipython in bool replace doc warning
DOC: use code block for shorter error message
Merge pull request #6412 from cpcloud/replace-bool-doc-fix

DOC: use ipython in bool replace doc warning
TST: GH6410 / numpy 4328
Merge pull request #6413 from jreback/32_bit_tests

TST: GH6410 / numpy 4328
This change is a working version that gives the performance improvement and passes tests. Refine in next steps.
BLD: add optional numpy_dev build
Merge pull request #6414 from jreback/numpy_dev

BLD: add optional numpy_dev build
BLD: tweak numpy_dev build
Merge remote-tracking branch 'upstream/master' into bug-fix-shift