Merge pull request #4969 from guyrt/issue-4382

BUG: fix skiprows option for python parser in read_csv
General print statement cleanup.
Merge pull request #4973 from alefnula/print-cleanup

CLN: General print statement cleanup.
TST/CLN: pare down the eval test suite
Merge pull request #4974 from cpcloud/eval-test-paredown

TST/CLN: pare down the eval test suite
FIX: JSON support non C locales
FIX: resample to single group with custom function
Merge pull request #4494 from Komnomnomnom/resample-sing-grp-bug

FIX: resample to single group with custom function
Merge pull request #4976 from Komnomnomnom/json-locale-fix

FIX: JSON support for non C locales
Fixed _format_labels in tile.py for np.inf.

Since the fractional part of np.inf is 0.0 it is enough to change the
formatter string in this case to the (nearly) equivalent "%.0f".
Fixes wrong overlapping check in _can_fast_union.

To use the fast_union method it is not enough to find an overlap, the
indices also have to be aligned.
Merge pull request #4954 from filmor/format-labels-fix

BUG: Fixed _format_labels in tile.py for np.inf.
ENH: add statsmodels wheel

Also removes the statsmodels/pandas faking part of ci/install.sh by using a
statsmodels wheel
CLN: proper version checking for statsmodels testWLS
BUG/ENH: provide better .loc based semantics for float based indicies, continuing not to fallback (related to GH236)

API: stub-implementation of Float64Index (meaning its the 'same' as an Index at this point), related GH263

BUG: make sure that mixed-integer-float is auto-converted to Float64Index

BUG: (GH4860), raise KeyError on indexing with a float (and not a floating index)

CLN/ENH: add _convert_scalar_indexer in core/index.py

CLN/ENH: add _convert_slice_indexer in core/index.py

TST: slice indexer test changes in series/frame

BUG: fix partial multi-indexing

DOC: release notes / v0.13.0
TST: tests for doc example

CLN: core/indexing.py clean
DOC: add to indexing.rst

DOC: small corections

API: make Float64Index getitem/ix/loc perform the same (as label based) for scalar indexing

TST: Float64Index construction & tests

TST: misc tests corrected in test_series/test_reshape/test_format

TST: Float64Index tests indexing via lists

DOC: additional example for float64index
Merge pull request #4981 from cpcloud/statsmodels-ci-addition

CI/ENH: test against an older version of statsmodels
API: properly box numeric timedelta ops on Series (GH4984)
Merge pull request #4985 from jreback/timedelta1

API: properly box numeric timedelta ops on Series (GH4984)
Merge pull request #4850 from jreback/loc_float

BUG/ENH: provide better .loc based semantics for float based indicies, continuing not to fallback (related GH236)
BUG: Bug in concatenation with duplicate columns across dtypes not merging with axis=0 (originally GH4771),
     fixed again is (GH4975)