Edit __init__.py with utf8 encode to fix TypeError

[RBBlackstone]

    Changed line 8:
    summary = output.split("Summary:")[-1]
to
    summary = output.decode('utf8').split("Summary:")[-1]

This is in response to the error:
TypeError: a bytes-like object is required, not 'str' on line 8 of __init__.py

It appears to be a change in python in version 3
Part of the story is here:
https://docs.python.org/3/howto/pyporting.html
see "Text versus binary data"

There is another branch that achieves this by specifying utf8 output from the subprocess.  Both work.  I am not sure of best practice.

-RB