Fixes #354

The issue #354 is fixed. 

See code below for a minimal working example.


```python
import time
from gcloud import storage
from gcloud.storage.demo import get_connection

c  = storage.demo.get_connection()
b = c.create_bucket('debug-gcloud-%d' % int(time.time()))
k = b.new_key("bare/my-new-file.txt")
k = k.set_contents_from_string("this is some dataaaaa!")
k = b.get_key("bare/my-new-file.txt")
print k.get_contents_as_string()
```