deprecation warning
getting the following warning using pandas 0.13.1 on python 2.7.6

```
/home/apratap/softwares/anaconda/lib/python2.7/site-packages/pandas/computation/ops.py:62: DeprecationWarning: object() takes no parameters
  return supr_new(klass, name, env, side=side, encoding=encoding)
/home/apratap/softwares/anaconda/lib/python2.7/site-packages/pandas/computation/ops.py:62: DeprecationWarning: object() takes no parameters
  return supr_new(klass, name, env, side=side, encoding=encoding)
```

df = pandas.DataFrame({'a':[1,2], 'foo':['bar', 'bazzo']})
df.query('a == 1')
