Python: Pandas zero-copy for ListArrays conversion

[asfimport]

In the case of the conversion of a list column to a pandas column, currently we always do a copy even though in the numeric case, we could avoid it most of the time. To enable zero-copy conversions, we need to pass a Python reference to a pyarrow.Column to the ConvertColumnToPandas inside of ConvertListsLike.

Reporter: Uwe Korn / @xhochy

_{Note: This issue was originally created as ARROW-489. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
Removed from 0.7.0. We are computing slices in arrow_to_pandas.cc, is there something else that needs to be done here?

[asfimport]

Wes McKinney / @wesm:
I think this is no longer a problem. If it turns up as a performance issue we can resolve it then