Fixes#61
It turns out I messed up the Server initialization code for the case
where a string is passed in as the address. The tests only cover the
cases where a raw socket is passed in. This will be rectified in a
following commit.
* change how restorer works
* fix join_promises
* add incref's all around to make sure we aren't freeing objects early
* make it so we return PyPromises everywhere and make chains collapsible
