Jupyterlab-server

- Switch to Python 3.5+ [55](https://github.com/jupyterlab/jupyterlab_server/pull/55) ([blink1073](https://github.com/blink1073))
- Switch to jupyter_server [49](https://github.com/jupyterlab/jupyterlab_server/pull/49) ([SylvainCorlay](https://github.com/SylvainCorlay))

- Fix PY2 handing of potential non-unicode paths being slugified. [54](https://github.com/jupyterlab/jupyterlab_server/pull/54) ([afshin](https://github.com/afshin))

- Improve use of process quiet flag [46](https://github.com/jupyterlab/jupyterlab_server/pull/46) ([vidartf](https://github.com/vidartf))

- Include LICENSE file in wheels [45](https://github.com/jupyterlab/jupyterlab_server/pull/45) ([toddrme2178](https://github.com/toddrme2178))
- move process utilities from jupyterlab to jupyterlab_launcher [44](https://github.com/jupyterlab/jupyterlab_server/pull/44) ([ivanov](https://github.com/ivanov))
- Update test for tornado 5 [43](https://github.com/jupyterlab/jupyterlab_server/pull/43) ([blink1073](https://github.com/blink1073))
- Include plugin/schema name in error messages. [39](https://github.com/jupyterlab/jupyterlab_server/pull/39) ([afshin](https://github.com/afshin))

- Include test assets in sdist [42](https://github.com/jupyterlab/jupyterlab_server/pull/42) ([hroncok](https://github.com/hroncok))

- Fix the URL patterns: ujoin() creates slashes. [38](https://github.com/jupyterlab/jupyterlab_server/pull/38) ([afshin](https://github.com/afshin))