TimeGrouper error on PanelGroupBy.agg with custom functions.

[dalejung]

http://nbviewer.ipython.org/4287202/

When using a regular groupby, custom agg functions will receive a Panel as expected. If you groupby with TimeGrouper, the agg function will receive a Series. The regular cython aggregates likes mean, sum work fine.

[wesm]

I see. Shouldn't be too hard to fix