Change notebook dir of auto started notebook server

[FelixKratz]

I would really like to supply my own --NotebookApp.notebook_dir argument for the jupyter notebook server which gets auto started. The reason for this is that I eventually want to banish all .ipynb files to /tmp/, such that only the *.ju.py files are kept and the ipynb is generated from it every time I open the file.

Thank you for this awesome project! It truly is a dream come true!

[kiyoon]

Sure, will add this option soon!

[kiyoon]

I'll add an option in the configuration default_notebook_dir and you will be able to set it to "{GIT_ROOT}", "{FILE_DIR}", "{TMP}", or any other path you want e.g. "{GIT_ROOT}/ipynb".

[kiyoon]

I've added an option notebook_dir and you can set it to /tmp. I didn't add variable options like GIT_ROOT to make it simple for now.

[FelixKratz]

Thanks!