Add script to open browser with login token

[whrobbins]

Write a script to grep the terminal output and automatically open a browser. Example terminal output:

docker run -it -v $(pwd):/notebooks -p 8888:8888 whrobbins/great-big-notebook:latest
[I 22:57:53.220 NotebookApp] Writing notebook server cookie secret to /root/.local/share/jupyter/runtime/notebook_cookie_secret
[I 22:57:53.248 NotebookApp] Serving notebooks from local directory: /
[I 22:57:53.248 NotebookApp] 0 active kernels
[I 22:57:53.248 NotebookApp] The Jupyter Notebook is running at: http://0.0.0.0:8888/?token=ba8e94bf96395730ff99e006ae4ae34d13242ca326f1ebe3
[I 22:57:53.248 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 22:57:53.249 NotebookApp]

    Copy/paste this URL into your browser when you connect for the first time,
    to login with a token:
        http://0.0.0.0:8888/?token=ba8e94bf96395730ff99e006ae4ae34d13242ca326f1ebe3