API/ENH: support datetime.time in a Timedelta
So this as expected. Though I its pretty straightforward to add support for this directly to a Timedelta, after the notion is the same, _though_ a `time` object can support a time-zone so not sure if this is odd (or maybe we should add an optional tz to Timedelta).

```
In [5]: from datetime import time

In [6]: time(secIn [8]: pd.Timedelta(time(second=1))
ValueError: Value must be Timedelta, string, integer, float, timedelta or convertible

In [9]: pd.Timedelta('1s')          
Out[9]: Timedelta('0 days 00:00:01')
```
