Typo in "README.md"

[harper1011]

Hi,

From "README.md" file, there are typo of member variables.
"is_sucess" should be "is_success".

Br,
-Dapeng Jiao

def _callback (response, ) :
... if not response.is_sucess :
... raise ValueError(response.error, )
...
... print response.body

_client.stream().add_callback(_callback, ).watch()

or

_client.stream().add_callback(_callback, ).request(watch=True, )

[spikeekips]

Thanks, @harper1011. fixed 👍