directory for output as last argument

[briochemc]

(This is a great little utility BTW, so thanks for it!)

I think it would be nice to be able to do something like

bash literate_run_nbconvert.sh demo/ODEIntroduction.ipynb another_output_folder

to specify another_output_folder 🙂

[oxinabox]

I would accept a PR to add this feature.

The julia version basically has this https://github.com/oxinabox/ipynb2LiterateJulia/blob/master/literate_run_nbconvert.jl

Maybe the Julia version should be made callable on the commandline