Display Pure "Date"s Without Time
I have a `Series` of "dates" (actually `datetime`s all at midnight), Is there any way to get this `Series` or `column` to render as just the date without the time string of "00:00:00"?

```
In [248]:
pd.Series([datetime(2013,1,1),datetime(2013,2,1)])

Out[248]:
0   2013-01-01 00:00:00
1   2013-02-01 00:00:00
dtype: datetime64[ns]
```
