added halflife to exponentially weighted moving functions
TST: added null conversions for TimeDeltaBlock in core/internals related (GH4396)
Merge pull request #5040 from jreback/sparc_fix

TST: added null conversions for TimeDeltaBlock in core/internals related (GH4396)
COMPAT: provide numpy compat with 1.7 for numeric methods when calling like: np.prod(obj)
        as numpy is now passing extra args to the pandas methods!
CLN: refactor all numeric type stats methods to core/generic.py
     from the object level modules (e.g. mean/sum/min/max....)
CLN: refactor cum methods to core/generic.py
CLN: make_stat_function for numeric methods in core/generic.py
Merge pull request #4998 from mortada/halflife

added halflife to exponentially weighted moving functions
BUG: Warn when dtypes differ in between chunks in csv parser

closes #3866

Silently fix problem rather than warning if we can coerce
to numerical type.
Merge pull request #5034 from jreback/numpy_compat

BUG/CLN: numpy compat with pandas numeric functions and cln of same (GH4435)
Merge branch 'issue-3866-column-conversion' of https://github.com/guyrt/pandas into guyrt-issue-3866-column-conversion

Conflicts:
	doc/source/release.rst
	pandas/io/tests/test_parsers.py