ER/API: unicode indices not supported on table formats in py2 (GH5386)
Merge pull request #5387 from jreback/hdf_index_tests

ER/API: unicode indices not supported on table formats in py2 (GH5386)
DOC: minor io.rst updates / cookbook.rst
BUG: groupby with a Float like index misbehaving when the index is non-monotonic (related GH5375)
Merge pull request #5393 from jreback/groupby_iloc

BUG: groupby with a Float like index misbehaving when the index is non-monotonic (related GH5375)
ENH: read_excel: try converting numeric to int

All Excel numeric data is stored as floats, so have to convert
specifically. Changing default because it's suprising to save something
with what looks like a row/column of integers and get a column of floats
instead. (especially because it can lead to annoying Float64Indexes)