UnicodeDecodeError with unicode column names in version 0.12
I can't give an example as I only get the error in some cases and I can't really reproduce it.

However I get this error from the `_repr_footer` method of `TimeSeries`. By comparing this method with `_repr_footer` of `Series` I saw that Series uses `com.pprint_thing` to get `namestr`, while TimeSeries uses `str`.

Changing the line

``` python
namestr = u"Name: %s, " % str(
```

in `TimeSeries._repr_footer` to 

``` python
namestr = u"Name: %s, " % com.pprint_thing(
```

resolves the issue.

Not sure, if this relevant any more, as Series inherits from NDFrame now.
