Instead of just enabling auto complete why not just connect to the notebook ala
`ein:connect-to-notebook`?
Update dependencies documented in README.rst
Force version check when starting the jupyter server - ein seems to be easily
confused in this regard.
Add configurable timeout (see `ein:jupyter-server-run-timeout`) that will
hopefully abort calls to `ein:jupyter-server-run` that hang; this is to help
with issues like those reported in #176.
Also update documentation, dependencies in preparation for 0.13.0 release.