Clearly document what a list-like is

[toobaz]

I think we need a doc section which states what is accepted as list-like: each method which accepts list-likes would then link to that doc section.

This will basically detail the types for which pandas.core.dtypes.common.is_list_like returns True, with the only exception of tuple, which we should not declare as list-like, but which some methods still accept for backward compatibility.

[datapythonista]

+1

I thought on this too. Not sure if there are more things that would benefit from a definition to have a glossary page in the doc.