DOC: shouldn't the call signature changes in 0.13 for Panel.reindex (and others) be listed explicitly in the API changes?
ie. was:
`Panel.reindex(major=None, minor=None, method=None, major_axis=None, minor_axis=None, copy=True, **kwargs)`
now:
`Panel.reindex(items=None, major_axis=None, minor_axis=None, **kwargs)`
