period_range() bug?
I did:

``` python
63 In : df = P.DataFrame(index=P.period_range('2000-1-1 10:20', '2005-1-1 12:00'))

64 In : df.index[0]
64 Out: Period('2000-01-01', 'D')

65 In : df.index[0].hour
65 Out: 0
```

it should have been 10, right?

why does period_range() loses time information?

I was recommended to use periods and period_range() because of pandas Timestamp limitation (nanoseconds time units)

now I'm stuck, because I need datetimes outside Timestamp range

ps.
would it be too drastic to change time units from nanoseconds to microseconds in Timestamp? so that we would be happier? :P
see also #7307
