AttributeError Block.items
https://github.com/pandas-dev/pandas/blob/master/pandas/core/internals.py#L326

`core.internals.Block` references `self.items`.  AFAICT `items` is an attribute of `BlockManager`, does not exist in `Block`.

```
ser = pd.Series(range(5))
mgr = ser._data
block = mgr.blocks[0]
>>> block.get(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/site-packages/pandas/core/internals.py", line 329, in get
    loc = self.items.get_loc(item)
AttributeError: 'IntBlock' object has no attribute 'items'
```