Bug in series.get?
This showed up in the test suite for a PR for statsmodels. I have very little idea where this Series came from or why it's using get like this, but here it is anyway.

```
df = pd.Series(np.array([43, 48, 60, 48, 50, 51, 50, 45, 57, 48, 56, 
                        45, 51, 39, 55, 43, 54, 52, 51, 54]), 
                  index=pd.Float64Index([25.0, 36.0, 49.0, 64.0, 81.0, 100.0, 
                                  121.0, 144.0, 169.0, 196.0, 1225.0, 
                                  1296.0, 1369.0, 1444.0, 1521.0, 1600.0,
                                  1681.0, 1764.0, 1849.0, 1936.0], 
                                  dtype='object'))
df.get(25, 0)
```

Traceback:

```
----> 1 df.get(25, 0)

/home/skipper/src/pandas-skipper/pandas/core/series.pyc in get(self, label, default)
    756         """
    757         try:
--> 758             return self.get_value(label)
    759         except KeyError:
    760             return default

/home/skipper/src/pandas-skipper/pandas/core/series.pyc in get_value(self, label)
    776         value : scalar value
    777         """
--> 778         return self.index.get_value(self.values, label)
    779 
    780     def set_value(self, label, value):

/home/skipper/src/pandas-skipper/pandas/core/index.pyc in get_value(self, series, key)
1821         k = _values_from_object(key)
1822         loc = self.get_loc(k)
-> 1823         new_values = series.values[loc]
1824         if np.isscalar(new_values):
1825             return new_values

AttributeError: 'numpy.ndarray' object has no attribute 'values'
```

Version

```
[~/]
[11]: pd.version.version
[11]: '0.13.1-105-g8119991'
```
